diff --git a/core/basics.ipynb b/core/basics.ipynb
index 738c5d0..451a891 100644
--- a/core/basics.ipynb
+++ b/core/basics.ipynb
@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:13e6414e26c196bc6cbaf0093750187f11c2637e20975d01f8e38416d518abb0"
+  "signature": "sha256:4c5eb8edee509b17587401073eef999428a00c5241d92995407623e288d445f1"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -64,11 +64,17 @@
      ],
      "prompt_number": 2
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "list() always creates a new list"
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# list always creates a new list\n",
       "c = list(a)\n",
       "a == c"
      ],
@@ -113,12 +119,17 @@
       "## Types"
      ]
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Knowing the type of an object is important, as it's useful to write functions that can handle many types of input."
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# Knowing the type of an object is important, as it's useful to write \n",
-      "# functions that can handle many types of input.\n",
       "type('foo')"
      ],
      "language": "python",
@@ -135,11 +146,17 @@
      ],
      "prompt_number": 5
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "isinstance() can take a type or tuple"
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# isinstance can take a type or tuple\n",
       "isinstance(7, (int, float))"
      ],
      "language": "python",
@@ -163,11 +180,17 @@
       "## Attributes and Methods"
      ]
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "List all attributes and methods"
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# List all attributes and methods\n",
       "dir('foo')"
      ],
      "language": "python",
@@ -254,11 +277,17 @@
      ],
      "prompt_number": 7
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Access help"
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# Access help\n",
       "help(str.upper)"
      ],
      "language": "python",
@@ -280,12 +309,17 @@
      ],
      "prompt_number": 8
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Access an attribute or method by name getattr, hasattr, and setattr can be used to write generic, reusable code"
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# Access an attribute or method by name\n",
-      "# getattr, hasattr, and setattr can be used to write generic, reusable code\n",
       "getattr('foo', 'split')"
      ],
      "language": "python",
@@ -332,8 +366,8 @@
       "\n",
       "    @classmethod\n",
       "    def convert_to_list(cls, obj):\n",
-      "        \"\"\"Converts obj to a list if it is not a list and it is iterable, else\n",
-      "        returns the original obj.\n",
+      "        \"\"\"Converts obj to a list if it is not a list and it is iterable, \n",
+      "        else returns the original obj.\n",
       "        \"\"\"\n",
       "        if not isinstance(obj, list) and cls.is_iterable(obj):\n",
       "            obj = list(obj)\n",
@@ -508,12 +542,17 @@
       "## range and xrange"
      ]
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Generate a list of evenly spaced integers.  Note: range is no longer avalable in Python 3 "
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# Note: range is no longer avalable in Python 3\n",
-      "# Generate a list of evenly spaced integers\n",
       "range(10)"
      ],
      "language": "python",
@@ -530,11 +569,17 @@
      ],
      "prompt_number": 16
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Range can take start, stop, and step arguments"
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# Range can take start, stop, and step arguments\n",
       "range(0, 20, 3)"
      ],
      "language": "python",
@@ -551,11 +596,17 @@
      ],
      "prompt_number": 17
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "It is very common to iterate through sequences by index with range"
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# It is very common to iterate through sequences by index with range\n",
       "seq = [1, 2, 3]\n",
       "for i in range(len(seq)):\n",
       "    val = seq[i]\n",
@@ -576,13 +627,17 @@
      ],
      "prompt_number": 18
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "xrange is recommended for longer ranges and is available in Python 3 as range.  It returns an iterator that generates integers one by one rather than all at once and storing them in a large list."
+     ]
+    },
     {
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "# xrange is recommended for longer ranges and is available in Python 3 as \n",
-      "# range.  It returns an iterator that generates integers one by one rather\n",
-      "# than all at once and storing them in a large list.\n",
       "sum = 0\n",
       "for i in xrange(100000):\n",
       "    if i % 2 == 0:\n",
@@ -601,15 +656,6 @@
       }
      ],
      "prompt_number": 19
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [],
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 19
     }
    ],
    "metadata": {}