Merge pull request udacity#169 from brandon-o/patch-1

Correct typo

Author: adarsh0806

projects/student_intervention/student_intervention.ipynb

@@ -356,7 +356,7 @@
     "# TODO: Import the three supervised learning models from sklearn\n",
     "# from sklearn import model_A\n",
     "# from sklearn import model_B\n",
-    "# from skearln import model_C\n",
+    "# from sklearn import model_C\n",
     "\n",
     "# TODO: Initialize the three models\n",
     "clf_A = None\n",