diff --git a/1_data_science/lernfall_1/Protokoll Lernfall 1.pdf b/1_data_science/lernfall_1/Protokoll Lernfall 1.pdf
new file mode 100644
index 0000000..12899fa
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diff --git a/1_data_science/lernfall_1/main.ipynb b/1_data_science/lernfall_1/main.ipynb
index dd1b99b..d2d91f7 100644
--- a/1_data_science/lernfall_1/main.ipynb
+++ b/1_data_science/lernfall_1/main.ipynb
@@ -158,6 +158,32 @@
     "data.head()"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Klassifizierung der Features\n",
+    "\n",
+    "### Stetige (metrische) Variablen\n",
+    "- Marktzins\n",
+    "- Tarifzins\n",
+    "- Guthaben\n",
+    "- Sparbeitrag\n",
+    "- Alter des Vertragsinhabers\n",
+    "\n",
+    "### Ordinale Variablen\n",
+    "- Vertragsalter\n",
+    "- Jahr\n",
+    "\n",
+    "### Nominale Variablen\n",
+    "- Status (aktiv, Vertragsende, verstorben, gekündigt)\n",
+    "- Beruf (angestellt, arbeitslos, selbstständig)\n",
+    "- Vertrag (Vertragsnummer) --> Unique Identifier\n",
+    "\n",
+    "### Sonstige\n",
+    "- p (technische Systemvariable)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -626,6 +652,13 @@
     "data[data['Vertragsnummer'] == 1].sort_values(by='Jahr')"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Aufbereitung der Daten"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,