diff --git a/module2/exo1/speel_schrijfboekje.ipynb b/module2/exo1/speel_schrijfboekje.ipynb
index 0115cd27069f04dcfcf449134d62377488c4258b..4ef01e5a6b0112941b0921c451cbaa8a226f97a3 100644
--- a/module2/exo1/speel_schrijfboekje.ipynb
+++ b/module2/exo1/speel_schrijfboekje.ipynb
@@ -74,31 +74,9 @@
     "hidePrompt": false
    },
    "source": [
-    "Dit is een doodgewone tekst over de constante `e` met waarde {{y}}"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "metadata": {},
-   "outputs": [
-    {
-     "ename": "ModuleNotFoundError",
-     "evalue": "No module named 'pydataset'",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mModuleNotFoundError\u001b[0m                       Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-3-4a7513b8eb8a>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;32mfrom\u001b[0m \u001b[0mpydataset\u001b[0m \u001b[0;32mimport\u001b[0m \u001b[0mdata\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0mquakes\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mdata\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'quakes'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      3\u001b[0m \u001b[0mquakes\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mhead\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      4\u001b[0m \u001b[0mquakes\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mtail\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mModuleNotFoundError\u001b[0m: No module named 'pydataset'"
-     ]
-    }
-   ],
-   "source": [
-    "from pydataset import data\n",
-    "quakes = data('quakes')\n",
-    "quakes.head()\n",
-    "quakes.tail()"
+    "Dit is een doodgewone tekst over de constante `e` met waarde {{y}}\n",
+    "\n",
+    "$P(A \\mid B) = \\frac{P(B \\mid A)P(A)}{P(B)}$"
    ]
   },
   {
@@ -123,6 +101,44 @@
     "os.system('jupyter nbconvert --to html speel_schrijfboekje.ipynb')"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "cars.png\t\t   toy_document_orgmode_python_en.org\r\n",
+      "cosxsx.png\t\t   toy_document_orgmode_python_fr.org\r\n",
+      "speel_schrijfboekje.html   toy_document_orgmode_R_en.org\r\n",
+      "speel_schrijfboekje.ipynb  toy_document_orgmode_R_fr.org\r\n",
+      "toy_document_en.Rmd\t   toy_notebook_en.ipynb\r\n",
+      "toy_document_fr.Rmd\t   toy_notebook_fr.ipynb\r\n"
+     ]
+    }
+   ],
+   "source": [
+    "!ls"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%pycat toy_document_en.Rmd"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "$P(A \\mid B) = \\frac{P(B \\mid A)P(A)}{P(B)}$"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,