diff --git a/module2/exo1/speel_schrijfboekje.ipynb b/module2/exo1/speel_schrijfboekje.ipynb
index f2fbeca6e9021acbcd5c3eedd67258826d53e5fb..2a63835d4e7a9c8c335826ac8c55965094cc04f4 100644
--- a/module2/exo1/speel_schrijfboekje.ipynb
+++ b/module2/exo1/speel_schrijfboekje.ipynb
@@ -2,7 +2,10 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "hideCode": false,
+    "hidePrompt": false
+   },
    "source": [
     "# Hoofdstuk1\n",
     "Dit is de eerste regel van hoofdstuk1"
@@ -10,31 +13,71 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {},
+   "execution_count": 2,
+   "metadata": {
+    "hideCode": false,
+    "hidePrompt": false
+   },
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "3.14\n"
+      "3.1415\n"
      ]
     }
    ],
    "source": [
-    "x =3.14\n",
+    "x =3.1415\n",
     "print(x)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "hideCode": false,
+    "hidePrompt": false
+   },
+   "source": [
+    "## Hoofdstuk2\n",
+    "Dit is de eerste regel van hoofdstuk2"
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
+   "execution_count": 7,
+   "metadata": {
+    "hideCode": false,
+    "hidePrompt": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "2.718281828459045\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "y = math.exp(1)\n",
+    "print(y)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "hideCode": false,
+    "hidePrompt": false
+   },
+   "source": [
+    "Dit is een doodgewone tekst over de contante `e` met waarde {{y}}"
+   ]
   }
  ],
  "metadata": {
+  "hide_code_all_hidden": false,
   "kernelspec": {
    "display_name": "Python 3",
    "language": "python",