diff --git a/doc/pub/week37/html/._week37-bs001.html b/doc/pub/week37/html/._week37-bs001.html
index 3512f1e2a..79bd2e925 100644
--- a/doc/pub/week37/html/._week37-bs001.html
+++ b/doc/pub/week37/html/._week37-bs001.html
@@ -308,6 +308,7 @@ MathJax.Hub.Config({
 <ul>
     <li> Hastie et al Chapter 7, here we recommend 7.1-7.5 and 7.10 (cross-validation) and 7.11 (bootstrap).</li> 
     <li> <a href="https://www.youtube.com/watch?v=fSytzGwwBVw" target="_self">Video on cross validation</a></li>
+    <li> <a href="https://www.youtube.com/watch?v=Xz0x-8-cgaQ" target="_self">Video on Bootstrapping</a></li>
     <li> <a href="https://www.youtube.com/watch?v=EuBBz3bI-aA" target="_self">Video on bias-variance tradeoff</a></li>
 </ul>
 </ul>
diff --git a/doc/pub/week37/html/week37-reveal.html b/doc/pub/week37/html/week37-reveal.html
index 85bb85885..88489c70d 100644
--- a/doc/pub/week37/html/week37-reveal.html
+++ b/doc/pub/week37/html/week37-reveal.html
@@ -232,6 +232,8 @@ MathJax.Hub.Config({
 
 <p><li> <a href="https://www.youtube.com/watch?v=fSytzGwwBVw" target="_blank">Video on cross validation</a></li>
 
+<p><li> <a href="https://www.youtube.com/watch?v=Xz0x-8-cgaQ" target="_blank">Video on Bootstrapping</a></li>
+
 <p><li> <a href="https://www.youtube.com/watch?v=EuBBz3bI-aA" target="_blank">Video on bias-variance tradeoff</a></li>
 </ul>
 <p>
diff --git a/doc/pub/week37/html/week37-solarized.html b/doc/pub/week37/html/week37-solarized.html
index 262368dd1..17d4d073c 100644
--- a/doc/pub/week37/html/week37-solarized.html
+++ b/doc/pub/week37/html/week37-solarized.html
@@ -281,6 +281,7 @@ MathJax.Hub.Config({
 <ul>
     <li> Hastie et al Chapter 7, here we recommend 7.1-7.5 and 7.10 (cross-validation) and 7.11 (bootstrap).</li> 
     <li> <a href="https://www.youtube.com/watch?v=fSytzGwwBVw" target="_blank">Video on cross validation</a></li>
+    <li> <a href="https://www.youtube.com/watch?v=Xz0x-8-cgaQ" target="_blank">Video on Bootstrapping</a></li>
     <li> <a href="https://www.youtube.com/watch?v=EuBBz3bI-aA" target="_blank">Video on bias-variance tradeoff</a></li>
 </ul>
 </ul>
diff --git a/doc/pub/week37/html/week37.html b/doc/pub/week37/html/week37.html
index 46048ee8e..8176977e8 100644
--- a/doc/pub/week37/html/week37.html
+++ b/doc/pub/week37/html/week37.html
@@ -358,6 +358,7 @@ MathJax.Hub.Config({
 <ul>
     <li> Hastie et al Chapter 7, here we recommend 7.1-7.5 and 7.10 (cross-validation) and 7.11 (bootstrap).</li> 
     <li> <a href="https://www.youtube.com/watch?v=fSytzGwwBVw" target="_blank">Video on cross validation</a></li>
+    <li> <a href="https://www.youtube.com/watch?v=Xz0x-8-cgaQ" target="_blank">Video on Bootstrapping</a></li>
     <li> <a href="https://www.youtube.com/watch?v=EuBBz3bI-aA" target="_blank">Video on bias-variance tradeoff</a></li>
 </ul>
 </ul>
diff --git a/doc/pub/week37/ipynb/ipynb-week37-src.tar.gz b/doc/pub/week37/ipynb/ipynb-week37-src.tar.gz
index 077b85883..6017621ae 100644
Binary files a/doc/pub/week37/ipynb/ipynb-week37-src.tar.gz and b/doc/pub/week37/ipynb/ipynb-week37-src.tar.gz differ
diff --git a/doc/pub/week37/ipynb/week37.ipynb b/doc/pub/week37/ipynb/week37.ipynb
index 3d6a1c1b9..e35251c38 100644
--- a/doc/pub/week37/ipynb/week37.ipynb
+++ b/doc/pub/week37/ipynb/week37.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "5d85a8ac",
+   "id": "b01fd4b1",
    "metadata": {
     "editable": true
    },
@@ -14,7 +14,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "82315184",
+   "id": "44a45b87",
    "metadata": {
     "editable": true
    },
@@ -31,7 +31,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7132df07",
+   "id": "efc03cc3",
    "metadata": {
     "editable": true
    },
@@ -63,12 +63,14 @@
     "\n",
     "    * [Video on cross validation](https://www.youtube.com/watch?v=fSytzGwwBVw)\n",
     "\n",
+    "    * [Video on Bootstrapping](https://www.youtube.com/watch?v=Xz0x-8-cgaQ)\n",
+    "\n",
     "    * [Video on bias-variance tradeoff](https://www.youtube.com/watch?v=EuBBz3bI-aA)"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "0928fd34",
+   "id": "585872a1",
    "metadata": {
     "editable": true
    },
@@ -78,7 +80,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9ee88de5",
+   "id": "942f4ba0",
    "metadata": {
     "editable": true
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@@ -107,7 +109,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fd2470fe",
+   "id": "4bbfb97d",
    "metadata": {
     "editable": true
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@@ -123,7 +125,7 @@
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   {
    "cell_type": "markdown",
-   "id": "8be57b04",
+   "id": "b7203b1b",
    "metadata": {
     "editable": true
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@@ -142,7 +144,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ee33fde6",
+   "id": "8a80f8fc",
    "metadata": {
     "editable": true
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@@ -156,7 +158,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "14124ae5",
+   "id": "64f383d8",
    "metadata": {
     "editable": true
    },
@@ -168,7 +170,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "02600bff",
+   "id": "a22c7dbf",
    "metadata": {
     "editable": true
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@@ -179,7 +181,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7df4b213",
+   "id": "afa24d29",
    "metadata": {
     "editable": true
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@@ -191,7 +193,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "996d8e2d",
+   "id": "adad5437",
    "metadata": {
     "editable": true
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@@ -203,7 +205,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "815b60ed",
+   "id": "a0e308aa",
    "metadata": {
     "editable": true
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@@ -219,7 +221,7 @@
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   {
    "cell_type": "markdown",
-   "id": "a93b64c7",
+   "id": "4f9d51a1",
    "metadata": {
     "editable": true
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@@ -230,7 +232,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "61c06c9b",
+   "id": "ac11edda",
    "metadata": {
     "editable": true
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@@ -253,7 +255,7 @@
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   {
    "cell_type": "markdown",
-   "id": "bb1eb3a5",
+   "id": "2dee4bc8",
    "metadata": {
     "editable": true
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@@ -264,7 +266,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ea804d82",
+   "id": "43158161",
    "metadata": {
     "editable": true
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@@ -276,7 +278,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "896c9968",
+   "id": "9cc312b1",
    "metadata": {
     "editable": true
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@@ -288,7 +290,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "27adffa2",
+   "id": "c9bf2c1b",
    "metadata": {
     "editable": true
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@@ -302,7 +304,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b3cb4e94",
+   "id": "fdac6a27",
    "metadata": {
     "editable": true
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@@ -333,7 +335,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "98964900",
+   "id": "059613fd",
    "metadata": {
     "editable": true
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@@ -355,7 +357,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ae46385d",
+   "id": "fdea1889",
    "metadata": {
     "editable": true
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@@ -367,7 +369,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "862ec8d1",
+   "id": "546b5ca1",
    "metadata": {
     "editable": true
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@@ -380,7 +382,7 @@
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   {
    "cell_type": "markdown",
-   "id": "1c05ca70",
+   "id": "d1fa67fa",
    "metadata": {
     "editable": true
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@@ -392,7 +394,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a714192d",
+   "id": "514550c7",
    "metadata": {
     "editable": true
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@@ -404,7 +406,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bd80e6ae",
+   "id": "b9a90eca",
    "metadata": {
     "editable": true
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@@ -416,7 +418,7 @@
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   {
    "cell_type": "markdown",
-   "id": "272d7c5c",
+   "id": "3f6f2edc",
    "metadata": {
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@@ -430,7 +432,7 @@
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   {
    "cell_type": "markdown",
-   "id": "c87b5aa5",
+   "id": "f27fe183",
    "metadata": {
     "editable": true
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@@ -440,7 +442,7 @@
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   {
    "cell_type": "markdown",
-   "id": "c946f771",
+   "id": "7889e185",
    "metadata": {
     "editable": true
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@@ -463,7 +465,7 @@
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   {
    "cell_type": "markdown",
-   "id": "e6b4e7dd",
+   "id": "229d9abb",
    "metadata": {
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@@ -475,7 +477,7 @@
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   {
    "cell_type": "markdown",
-   "id": "8169d91a",
+   "id": "bdf5c751",
    "metadata": {
     "editable": true
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@@ -488,7 +490,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "99e90d11",
+   "id": "7e91e0cb",
    "metadata": {
     "editable": true
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@@ -500,7 +502,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0b4adc26",
+   "id": "41f2e22c",
    "metadata": {
     "editable": true
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@@ -512,7 +514,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9ca9e238",
+   "id": "0b31a9a1",
    "metadata": {
     "editable": true
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@@ -524,7 +526,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "23dcb3a5",
+   "id": "5f74f14c",
    "metadata": {
     "editable": true
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@@ -535,7 +537,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "67cb2d01",
+   "id": "c10936c8",
    "metadata": {
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@@ -547,7 +549,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "80d807da",
+   "id": "1c51efe9",
    "metadata": {
     "editable": true
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@@ -558,7 +560,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "14b1cbfd",
+   "id": "a7c1a4a4",
    "metadata": {
     "editable": true
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@@ -570,7 +572,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cf86395e",
+   "id": "43061633",
    "metadata": {
     "editable": true
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@@ -580,7 +582,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4eee417a",
+   "id": "69cada77",
    "metadata": {
     "editable": true
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@@ -611,7 +613,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "02893846",
+   "id": "1898dbca",
    "metadata": {
     "editable": true
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@@ -623,7 +625,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "098674aa",
+   "id": "e7dccd6f",
    "metadata": {
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@@ -635,7 +637,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "76b18e95",
+   "id": "a10fbd18",
    "metadata": {
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@@ -645,7 +647,7 @@
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   {
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-   "id": "52c82f5e",
+   "id": "3530ff5f",
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@@ -657,7 +659,7 @@
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   {
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-   "id": "46e101f5",
+   "id": "f2fde118",
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@@ -667,7 +669,7 @@
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   {
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-   "id": "e8527450",
+   "id": "bc004664",
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@@ -679,7 +681,7 @@
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   {
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-   "id": "a421d3d5",
+   "id": "af134f1e",
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@@ -689,7 +691,7 @@
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   {
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-   "id": "22137f8a",
+   "id": "a4833625",
    "metadata": {
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@@ -701,7 +703,7 @@
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   {
    "cell_type": "markdown",
-   "id": "4eb8b2fa",
+   "id": "8c6ce40d",
    "metadata": {
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@@ -711,7 +713,7 @@
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   {
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-   "id": "8752defc",
+   "id": "428e7d77",
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@@ -731,7 +733,7 @@
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   {
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-   "id": "4befff39",
+   "id": "e9884bd0",
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@@ -743,7 +745,7 @@
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   {
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-   "id": "d18ce941",
+   "id": "167cca6b",
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@@ -753,7 +755,7 @@
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   {
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-   "id": "0a4fd449",
+   "id": "7954e72f",
    "metadata": {
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@@ -765,7 +767,7 @@
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   {
    "cell_type": "markdown",
-   "id": "ec27160e",
+   "id": "e5e041c9",
    "metadata": {
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@@ -777,7 +779,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cd11746f",
+   "id": "fe7cdfb3",
    "metadata": {
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@@ -789,7 +791,7 @@
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   {
    "cell_type": "markdown",
-   "id": "b966cbbf",
+   "id": "2073c56b",
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@@ -801,7 +803,7 @@
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   {
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-   "id": "bccd1443",
+   "id": "4e077392",
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@@ -813,7 +815,7 @@
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   {
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+   "id": "53621deb",
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@@ -825,7 +827,7 @@
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   {
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+   "id": "3a77431d",
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@@ -837,7 +839,7 @@
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-   "id": "ccc6b096",
+   "id": "786d7efe",
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@@ -849,7 +851,7 @@
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-   "id": "86507503",
+   "id": "8f01293e",
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@@ -859,7 +861,7 @@
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   {
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+   "id": "6cb289dc",
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@@ -871,7 +873,7 @@
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@@ -881,7 +883,7 @@
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@@ -900,7 +902,7 @@
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@@ -921,7 +923,7 @@
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@@ -933,7 +935,7 @@
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@@ -944,7 +946,7 @@
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@@ -957,7 +959,7 @@
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@@ -969,7 +971,7 @@
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@@ -979,7 +981,7 @@
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@@ -991,7 +993,7 @@
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@@ -1001,7 +1003,7 @@
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@@ -1013,7 +1015,7 @@
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@@ -1023,7 +1025,7 @@
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@@ -1037,7 +1039,7 @@
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@@ -1049,7 +1051,7 @@
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@@ -1059,7 +1061,7 @@
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@@ -1071,7 +1073,7 @@
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@@ -1081,7 +1083,7 @@
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@@ -1093,7 +1095,7 @@
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@@ -1103,7 +1105,7 @@
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@@ -1115,7 +1117,7 @@
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+   "id": "0f62c28f",
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@@ -1125,7 +1127,7 @@
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+   "id": "a3241d36",
    "metadata": {
     "editable": true
    },
@@ -1141,7 +1143,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5911b76d",
+   "id": "5d92c7bc",
    "metadata": {
     "editable": true
    },
@@ -1153,7 +1155,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6029916b",
+   "id": "3c503db1",
    "metadata": {
     "editable": true
    },
@@ -1163,7 +1165,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b704a6fd",
+   "id": "117cbb16",
    "metadata": {
     "editable": true
    },
@@ -1175,7 +1177,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "60c7948c",
+   "id": "a82a6f35",
    "metadata": {
     "editable": true
    },
@@ -1188,7 +1190,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "51dcd9c3",
+   "id": "9930e40e",
    "metadata": {
     "editable": true
    },
@@ -1200,7 +1202,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c6512c09",
+   "id": "5435e961",
    "metadata": {
     "editable": true
    },
@@ -1210,7 +1212,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2c5ca7b5",
+   "id": "6f3264e4",
    "metadata": {
     "editable": true
    },
@@ -1222,7 +1224,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1c530682",
+   "id": "e6fa0b58",
    "metadata": {
     "editable": true
    },
@@ -1232,7 +1234,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "81771a49",
+   "id": "886b042b",
    "metadata": {
     "editable": true
    },
@@ -1244,7 +1246,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c2aac5ba",
+   "id": "64d75f6f",
    "metadata": {
     "editable": true
    },
@@ -1256,7 +1258,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d2e548d7",
+   "id": "fcf0f05f",
    "metadata": {
     "editable": true
    },
@@ -1266,7 +1268,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2901f9c7",
+   "id": "c689d23e",
    "metadata": {
     "editable": true
    },
@@ -1278,7 +1280,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8b0dc761",
+   "id": "1b30d4ea",
    "metadata": {
     "editable": true
    },
@@ -1290,7 +1292,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "81709208",
+   "id": "395b59bc",
    "metadata": {
     "editable": true
    },
@@ -1302,7 +1304,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "757cbc8c",
+   "id": "fe60f31d",
    "metadata": {
     "editable": true
    },
@@ -1312,7 +1314,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "337a92ec",
+   "id": "c62bb449",
    "metadata": {
     "editable": true
    },
@@ -1324,7 +1326,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "170ec18c",
+   "id": "a0acba25",
    "metadata": {
     "editable": true
    },
@@ -1334,7 +1336,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1919001a",
+   "id": "3dd24af3",
    "metadata": {
     "editable": true
    },
@@ -1353,7 +1355,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "861c96a1",
+   "id": "6917a474",
    "metadata": {
     "editable": true
    },
@@ -1381,7 +1383,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9e8d9abb",
+   "id": "24cec8c3",
    "metadata": {
     "editable": true
    },
@@ -1407,7 +1409,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cca36e61",
+   "id": "89ad7a09",
    "metadata": {
     "editable": true
    },
@@ -1424,7 +1426,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "060a4427",
+   "id": "2902167c",
    "metadata": {
     "editable": true
    },
@@ -1444,7 +1446,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bc631501",
+   "id": "082db7cc",
    "metadata": {
     "editable": true
    },
@@ -1473,7 +1475,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "65212453",
+   "id": "9c0f97ec",
    "metadata": {
     "editable": true
    },
@@ -1498,7 +1500,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ce801e18",
+   "id": "97db2ddf",
    "metadata": {
     "editable": true
    },
@@ -1518,7 +1520,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "927e2be5",
+   "id": "fa694ca7",
    "metadata": {
     "editable": true
    },
@@ -1530,7 +1532,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fe6c7817",
+   "id": "e70aa901",
    "metadata": {
     "editable": true
    },
@@ -1540,7 +1542,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b0ae80c3",
+   "id": "4603da33",
    "metadata": {
     "editable": true
    },
@@ -1555,7 +1557,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b8bf320d",
+   "id": "c6228bb8",
    "metadata": {
     "editable": true
    },
@@ -1568,7 +1570,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "62def127",
+   "id": "52dee4b9",
    "metadata": {
     "editable": true
    },
@@ -1581,7 +1583,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "71d882fb",
+   "id": "8a1618e6",
    "metadata": {
     "editable": true
    },
@@ -1593,7 +1595,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "37f348c8",
+   "id": "c78c1c3c",
    "metadata": {
     "editable": true
    },
@@ -1606,7 +1608,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0b949710",
+   "id": "4ec445f3",
    "metadata": {
     "editable": true
    },
@@ -1617,7 +1619,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "673d5c06",
+   "id": "eaaeee09",
    "metadata": {
     "editable": true
    },
@@ -1631,7 +1633,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "81c0beaf",
+   "id": "263f8dae",
    "metadata": {
     "editable": true
    },
@@ -1641,7 +1643,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e83202fb",
+   "id": "8d107200",
    "metadata": {
     "editable": true
    },
@@ -1655,7 +1657,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "27744da9",
+   "id": "536dfe52",
    "metadata": {
     "editable": true
    },
@@ -1668,7 +1670,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "420c8688",
+   "id": "8cfaa620",
    "metadata": {
     "editable": true
    },
@@ -1681,7 +1683,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "591e95ca",
+   "id": "61d1ad72",
    "metadata": {
     "editable": true
    },
@@ -1691,7 +1693,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a044c8a4",
+   "id": "3fe1619f",
    "metadata": {
     "editable": true
    },
@@ -1704,7 +1706,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "22b21609",
+   "id": "2dce0fc0",
    "metadata": {
     "editable": true
    },
@@ -1714,7 +1716,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "461ba192",
+   "id": "02476632",
    "metadata": {
     "editable": true
    },
@@ -1727,7 +1729,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "97d21082",
+   "id": "6a81d0b6",
    "metadata": {
     "editable": true
    },
@@ -1739,7 +1741,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1231f2f0",
+   "id": "4b6b30ea",
    "metadata": {
     "editable": true
    },
@@ -1758,7 +1760,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "def2d3ca",
+   "id": "7cb03fff",
    "metadata": {
     "editable": true
    },
@@ -1771,7 +1773,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "acdeb582",
+   "id": "84cb3cf4",
    "metadata": {
     "editable": true
    },
@@ -1783,7 +1785,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ad0ce315",
+   "id": "87d68e2d",
    "metadata": {
     "editable": true
    },
@@ -1796,7 +1798,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6be519fc",
+   "id": "9028b69e",
    "metadata": {
     "editable": true
    },
@@ -1816,7 +1818,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "72497b42",
+   "id": "81cb25ef",
    "metadata": {
     "editable": true
    },
@@ -1839,7 +1841,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7d663e8f",
+   "id": "8cb18602",
    "metadata": {
     "editable": true
    },
@@ -1854,7 +1856,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4925ba6e",
+   "id": "f4388f16",
    "metadata": {
     "editable": true
    },
@@ -1866,7 +1868,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9fbe8108",
+   "id": "44860632",
    "metadata": {
     "editable": true
    },
@@ -1886,7 +1888,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b6b2b234",
+   "id": "7f84d8e5",
    "metadata": {
     "editable": true
    },
@@ -1906,7 +1908,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "82bd2034",
+   "id": "591d4185",
    "metadata": {
     "editable": true
    },
@@ -1930,7 +1932,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "61a94d24",
+   "id": "551b6e48",
    "metadata": {
     "editable": true
    },
@@ -1951,7 +1953,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fd22fd14",
+   "id": "4b953459",
    "metadata": {
     "editable": true
    },
@@ -1981,7 +1983,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3497401f",
+   "id": "52a48932",
    "metadata": {
     "editable": true
    },
@@ -2005,7 +2007,7 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "id": "3ef8772f",
+   "id": "182e51b5",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2044,7 +2046,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ffe9e08b",
+   "id": "967a6335",
    "metadata": {
     "editable": true
    },
@@ -2054,7 +2056,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c8770096",
+   "id": "16cadf05",
    "metadata": {
     "editable": true
    },
@@ -2065,7 +2067,7 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "id": "ac35a65b",
+   "id": "5825b06f",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2085,7 +2087,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e4ad71a5",
+   "id": "ed1cfe14",
    "metadata": {
     "editable": true
    },
@@ -2103,7 +2105,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "edcf8b5c",
+   "id": "969d4ddf",
    "metadata": {
     "editable": true
    },
@@ -2115,7 +2117,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "77b70dca",
+   "id": "b5e6dc10",
    "metadata": {
     "editable": true
    },
@@ -2132,7 +2134,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "07cccff6",
+   "id": "8188dc0c",
    "metadata": {
     "editable": true
    },
@@ -2144,7 +2146,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b04fa9bd",
+   "id": "9acfaf8c",
    "metadata": {
     "editable": true
    },
@@ -2154,7 +2156,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c79570c2",
+   "id": "a05ac35e",
    "metadata": {
     "editable": true
    },
@@ -2166,7 +2168,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9a8a6a3b",
+   "id": "4e2e3da4",
    "metadata": {
     "editable": true
    },
@@ -2183,7 +2185,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a9a892c2",
+   "id": "2dec9a7c",
    "metadata": {
     "editable": true
    },
@@ -2195,7 +2197,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0057120a",
+   "id": "a4b2b846",
    "metadata": {
     "editable": true
    },
@@ -2205,7 +2207,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9e9b0c0f",
+   "id": "a191e0ac",
    "metadata": {
     "editable": true
    },
@@ -2217,7 +2219,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4b28d5f5",
+   "id": "1ec0291e",
    "metadata": {
     "editable": true
    },
@@ -2227,7 +2229,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3fbb0a03",
+   "id": "c49ce956",
    "metadata": {
     "editable": true
    },
@@ -2239,7 +2241,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c367d950",
+   "id": "9bc7eda1",
    "metadata": {
     "editable": true
    },
@@ -2249,7 +2251,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e71acf60",
+   "id": "f42f620a",
    "metadata": {
     "editable": true
    },
@@ -2265,7 +2267,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "93070f01",
+   "id": "5121f450",
    "metadata": {
     "editable": true
    },
@@ -2276,7 +2278,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "id": "a46b37f7",
+   "id": "19b88b91",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2341,7 +2343,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "152a6857",
+   "id": "b8c8f9cc",
    "metadata": {
     "editable": true
    },
@@ -2352,7 +2354,7 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "id": "c385948e",
+   "id": "6634be8b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2409,7 +2411,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a6ddc62c",
+   "id": "cf252a96",
    "metadata": {
     "editable": true
    },
@@ -2447,7 +2449,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3ff69bcd",
+   "id": "4ea91702",
    "metadata": {
     "editable": true
    },
@@ -2458,7 +2460,7 @@
   {
    "cell_type": "code",
    "execution_count": 5,
-   "id": "16bd46aa",
+   "id": "2123b1e9",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2540,7 +2542,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d898e22e",
+   "id": "cd47e7db",
    "metadata": {
     "editable": true
    },
@@ -2565,7 +2567,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b3c4bc74",
+   "id": "615a397e",
    "metadata": {
     "editable": true
    },
@@ -2593,7 +2595,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "35277af5",
+   "id": "edd51643",
    "metadata": {
     "editable": true
    },
@@ -2606,7 +2608,7 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "id": "6e8a01e6",
+   "id": "efb30d52",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2706,7 +2708,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "addf22bf",
+   "id": "5f2daae6",
    "metadata": {
     "editable": true
    },
@@ -2717,7 +2719,7 @@
   {
    "cell_type": "code",
    "execution_count": 7,
-   "id": "f1af3e2c",
+   "id": "d6440291",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2806,7 +2808,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c05b2a3a",
+   "id": "b5102ece",
    "metadata": {
     "editable": true
    },
@@ -2816,7 +2818,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "be50bfa2",
+   "id": "149f630f",
    "metadata": {
     "editable": true
    },
@@ -2829,7 +2831,7 @@
   {
    "cell_type": "code",
    "execution_count": 8,
-   "id": "33fb2f51",
+   "id": "1c26a64e",
    "metadata": {
     "collapsed": false,
     "editable": true
diff --git a/doc/src/week37/programs/codeexamplesscaling.ipynb b/doc/src/week37/programs/codeexamplesscaling.ipynb
index d4493a0b7..e85829f91 100644
--- a/doc/src/week37/programs/codeexamplesscaling.ipynb
+++ b/doc/src/week37/programs/codeexamplesscaling.ipynb
@@ -547,7 +547,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 43,
+   "execution_count": 45,
    "id": "a721dffd",
    "metadata": {},
    "outputs": [
@@ -555,13 +555,13 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "[0.  0.5 3.7]\n",
-      "[0.         0.49997445 3.69992817]\n",
-      "2.000000000000007\n",
+      "[0.5 3.7]\n",
+      "[0.49997445 3.69992817]\n",
+      "1.9999999999999947\n",
       "2.00021345091295\n",
       "  \n",
       "test MSE of OLS\n",
-      "3.729339929432333e-29\n",
+      "1.7086727207087115e-28\n",
       "  \n",
       "test MSE of Ridge\n",
       "6.420926689334773e-08\n"
@@ -582,7 +582,7 @@
     "from sklearn import linear_model\n",
     "np.random.seed(2018)\n",
     "n = 100\n",
-    "d = 3\n",
+    "d = 2\n",
     "Lambda = 0.01\n",
     "true_beta = [2, 0.5, 3.7]\n",
     "\n",
@@ -595,7 +595,7 @@
     "#Design matrix X does include the intercept. \n",
     "X = np.zeros((n, d))\n",
     "for p in range(d):     \n",
-    "    X[:, p] = x ** (p)\n",
+    "    X[:, p] = x ** (p+1)\n",
     "\n",
     "\n",
     "#Split data in train and test\n",
@@ -644,7 +644,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "8b3b48ac",
+   "id": "cf021a10",
    "metadata": {},
    "outputs": [],
    "source": []
diff --git a/doc/src/week37/week37.do.txt b/doc/src/week37/week37.do.txt
index ddaab9303..d4ef0d719 100644
--- a/doc/src/week37/week37.do.txt
+++ b/doc/src/week37/week37.do.txt
@@ -21,6 +21,7 @@ DATE: today
   * Reads and Videos:
     * Hastie et al Chapter 7, here we recommend 7.1-7.5 and 7.10 (cross-validation) and 7.11 (bootstrap). 
     * "Video on cross validation":"https://www.youtube.com/watch?v=fSytzGwwBVw"
+    * "Video on Bootstrapping":"https://www.youtube.com/watch?v=Xz0x-8-cgaQ"
     * "Video on bias-variance tradeoff":"https://www.youtube.com/watch?v=EuBBz3bI-aA"
 !eblock