diff --git a/notebook.ipynb b/notebook.ipynb
index 84ad0542284c2fa26ddd5e0765afd1f74102cffa..ff7d920b6194c5f05814f776b048a798f34b4037 100644
--- a/notebook.ipynb
+++ b/notebook.ipynb
@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:bf6c651b1482834080a5bec22664d3f8b69e32fdf9036b00a12959d76f47d3be"
+  "signature": "sha256:f32a4926b7461da7133e01bae5a7f9c6b580667534ff6f2af9832df26de9c88e"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -613,9 +613,10 @@
       "    - $ ipython notebook\n",
       "This opens a webbrowser and shows existing notebooks.\n",
       "    - Create a new notebook by clicking the 'New notebook' button.\n",
-      "A new tab will open with a fresh notebook.\n",
-      "    - Rename your notebook to something useful by clicking on the current name (Untitled1).\n",
-      "Add the code shown below to some cells and run it by pressing the play button or shift+enter"
+      "A new tab will open with a fresh notebook. Rename your notebook to something useful\n",
+      "    - Click on the current name (Untitled1) and edit this\n",
+      "Add the code shown below to some cells\n",
+      "    - Add cells by pressen the '+' button or ALT+ENTER"
      ]
     },
     {
@@ -626,17 +627,8 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": []
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "seq = 'GAATTC'"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": []
+     "outputs": [],
+     "prompt_number": 1
     },
     {
      "cell_type": "code",
@@ -650,7 +642,8 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": []
+     "outputs": [],
+     "prompt_number": 3
     },
     {
      "cell_type": "code",
@@ -662,17 +655,8 @@
      ],
      "language": "python",
      "metadata": {},
-     "outputs": []
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "print reverse(translate(seq))"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": []
+     "outputs": [],
+     "prompt_number": 7
     },
     {
      "cell_type": "heading",
@@ -994,13 +978,16 @@
      ]
     },
     {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
       "# Header 1\n",
       "## Header 2\n",
       "### Header 3"
-     ]
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -1020,14 +1007,17 @@
      ]
     },
     {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
       "- A list\n",
       "    - A sublist\n",
       "        - Yet another level\n",
       "            - And so on"
-     ]
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
     },
     {
      "cell_type": "markdown",
@@ -1048,7 +1038,7 @@
      ]
     },
     {
-     "cell_type": "markdown",
+     "cell_type": "raw",
      "metadata": {},
      "source": [
       "<table border=\"1\" style=\"width:200px\">\n",
@@ -1092,7 +1082,7 @@
      ]
     },
     {
-     "cell_type": "markdown",
+     "cell_type": "raw",
      "metadata": {},
      "source": [
       "\\begin{equation*} \\left( \\sum_{k=1}^n a_k b_k \\right)^2 \\leq \\left( \\sum_{k=1}^n a_k^2 \\right) \\left( \\sum_{k=1}^n b_k^2 \\right) \\end{equation*}\n"
@@ -1105,6 +1095,80 @@
       "\\begin{equation*} \\left( \\sum_{k=1}^n a_k b_k \\right)^2 \\leq \\left( \\sum_{k=1}^n a_k^2 \\right) \\left( \\sum_{k=1}^n b_k^2 \\right) \\end{equation*}\n"
      ]
     },
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "\u00a7 Excercise : My next Notebook"
+     ]
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Let's add some markdown cells\n",
+      "- Select the top code cell, press ESC to go into command mode\n",
+      "- Press 'b', this will add a cell above the selected cell\n",
+      "- Notice the focus is on the new cell\n",
+      "- Now press 'm' to set the celltype to Markdown\n",
+      "- Press ENTER and add some text"
+     ]
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "### My next notebook\n",
+      "[Michiel van Galen](mailto:m.van_galen@lumc.nl)"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "complements = {'A': 'T', 'C': 'G', 'T': 'A', 'G': 'C'} "
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 8
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "def translate(s):\n",
+      "    c  = ''\n",
+      "    for i in s:\n",
+      "        c  = c + complements[i]\n",
+      "    return c"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 9
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "def reverse(s):\n",
+      "    rev = s[::-1]\n",
+      "    return rev"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
+    },
     {
      "cell_type": "heading",
      "level": 1,