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diff --git a/README.html b/README.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="" xml:lang="">
+<head>
+  <meta charset="utf-8" />
+  <meta name="generator" content="pandoc" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
+  <title>README</title>
+  <style>
+    code{white-space: pre-wrap;}
+    span.smallcaps{font-variant: small-caps;}
+    span.underline{text-decoration: underline;}
+    div.column{display: inline-block; vertical-align: top; width: 50%;}
+    div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
+  </style>
+  <!--[if lt IE 9]>
+    <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
+  <![endif]-->
+</head>
+<body>
+<h1 id="computational-mechanics-03--initial-value-problems">Computational Mechanics 03- Initial Value Problems</h1>
+<figure>
+<img src="https://publicdomainvectors.org/photos/under-construction_geek_man_01.png" alt="" /><figcaption>Warning: Under Construction!!</figcaption>
+</figure>
+</body>
+</html>
diff --git a/README.md b/README.md
@@ -1 +1,4 @@
-# Computational Mechanics 03
+# Computational Mechanics 03- Initial Value Problems
+
+![Warning: Under
+Construction!!](https://publicdomainvectors.org/photos/under-construction_geek_man_01.png)
diff --git a/data/.ipynb_checkpoints/therocket-checkpoint.txt b/data/.ipynb_checkpoints/therocket-checkpoint.txt
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diff --git a/notebooks/1_Catch_Motion.ipynb → ...ckpoints/01_Catch_Motion-checkpoint.ipynb b/notebooks/1_Catch_Motion.ipynb → ...ckpoints/01_Catch_Motion-checkpoint.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "###### Content under Creative Commons Attribution license CC-BY 4.0, code under BSD 3-Clause License © 2017 L.A. Barba, N.C. Clementi"
+    "###### Modified under Creative Commons Attribution license CC-BY 4.0, code under BSD 3-Clause License © 2020 R.C. Cooper"
    ]
   },
   {
@@ -13,9 +13,9 @@
    "source": [
     "# Catch things in motion\n",
     "\n",
-    "This module of the _Engineering Computations_ course is our launching pad to investigate _change_, _motion_, _dynamics_, using computational thinking, Python, and Jupyter.\n",
+    "This module of the _Computational Mechanics_ course is our launching pad to investigate _change_, _motion_, and _dynamics_, using computational thinking, Python, and Jupyter.\n",
     "\n",
-    "The foundation of physics and engineering is the subject of **mechanics**: how things move around, when pushed around. Or pulled… in the beginning of the history of mechanics, Galileo and Newton seeked to understand how and why objects fall under the pull of gravity.\n",
+    "The foundation of physics and engineering is the subject of **mechanics**: how things move around, when pushed around. Or pulled... in the beginning of the history of mechanics, Galileo and Newton sought to understand how and why objects fall under the pull of gravity.\n",
     "\n",
     "This first lesson will explore motion by analyzing images and video, to learn about velocity and acceleration."
    ]
@@ -33,7 +33,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [
     {
@@ -51,7 +51,7 @@
        "        "
       ],
       "text/plain": [
-       "<IPython.lib.display.YouTubeVideo at 0x107b87278>"
+       "<IPython.lib.display.YouTubeVideo at 0x7fb87c2f4d50>"
       ]
      },
      "metadata": {},
@@ -111,7 +111,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 28,
    "metadata": {},
    "outputs": [
     {
@@ -120,7 +120,7 @@
        "imageio.plugins.ffmpeg.FfmpegFormat.Reader"
       ]
      },
-     "execution_count": 4,
+     "execution_count": 28,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -131,27 +131,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "1233"
-      ]
-     },
-     "execution_count": 5,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "len(reader)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 31,
    "metadata": {},
    "outputs": [
     {
@@ -173,7 +153,7 @@
    "source": [
     "##### Note:\n",
     "\n",
-    "You may get this error after calling `get_reader()`:\n",
+    "You may get this error after calling `get_reader()` if you're not running in the class Jupyter server:\n",
     "  \n",
     "```\n",
     "NeedDownloadError: Need ffmpeg exe. You can obtain it with either:\n",

diff --git a/...heckpoints/2_Step_Future-checkpoint.ipynb → ...eckpoints/02_Step_Future-checkpoint.ipynb b/...heckpoints/2_Step_Future-checkpoint.ipynb → ...eckpoints/02_Step_Future-checkpoint.ipynb
diff --git a/notebooks/3_Get_Oscillations.ipynb → ...ints/03_Get_Oscillations-checkpoint.ipynb b/notebooks/3_Get_Oscillations.ipynb → ...ints/03_Get_Oscillations-checkpoint.ipynb