diff --git a/pandas/pandas_clean.ipynb b/pandas/pandas_clean.ipynb
index 221366f..88efc19 100644
--- a/pandas/pandas_clean.ipynb
+++ b/pandas/pandas_clean.ipynb
@@ -13,10 +13,8 @@
      "metadata": {},
      "source": [
       "# Pandas Cleaning\n",
-      "* Clean\n",
-      "* Transform\n",
-      "* Merge\n",
-      "* Reshape\n",
+      "* Replace\n",
+      "* Drop\n",
       "* Concatenate"
      ]
     },
@@ -36,7 +34,7 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "Check for matching values in a specific column for replacement:"
+      "Setup a DataFrame:"
      ]
     },
     {
@@ -115,61 +113,11 @@
      "prompt_number": 2
     },
     {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "df_1[df_1['state'] == 'VA']"
-     ],
-     "language": "python",
+     "cell_type": "markdown",
      "metadata": {},
-     "outputs": [
-      {
-       "html": [
-        "<div style=\"max-height:1000px;max-width:1500px;overflow:auto;\">\n",
-        "<table border=\"1\" class=\"dataframe\">\n",
-        "  <thead>\n",
-        "    <tr style=\"text-align: right;\">\n",
-        "      <th></th>\n",
-        "      <th>population</th>\n",
-        "      <th>state</th>\n",
-        "      <th>year</th>\n",
-        "    </tr>\n",
-        "  </thead>\n",
-        "  <tbody>\n",
-        "    <tr>\n",
-        "      <th>0</th>\n",
-        "      <td> 5.0</td>\n",
-        "      <td> VA</td>\n",
-        "      <td> 2012</td>\n",
-        "    </tr>\n",
-        "    <tr>\n",
-        "      <th>1</th>\n",
-        "      <td> 5.1</td>\n",
-        "      <td> VA</td>\n",
-        "      <td> 2013</td>\n",
-        "    </tr>\n",
-        "    <tr>\n",
-        "      <th>2</th>\n",
-        "      <td> 5.2</td>\n",
-        "      <td> VA</td>\n",
-        "      <td> 2014</td>\n",
-        "    </tr>\n",
-        "  </tbody>\n",
-        "</table>\n",
-        "</div>"
-       ],
-       "metadata": {},
-       "output_type": "pyout",
-       "prompt_number": 3,
-       "text": [
-        "   population state  year\n",
-        "0         5.0    VA  2012\n",
-        "1         5.1    VA  2013\n",
-        "2         5.2    VA  2014"
-       ]
-      }
-     ],
-     "prompt_number": 3
+     "source": [
+      "## Replace"
+     ]
     },
     {
      "cell_type": "markdown",
@@ -329,6 +277,13 @@
      ],
      "prompt_number": 5
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "## Drop"
+     ]
+    },
     {
      "cell_type": "markdown",
      "metadata": {},
@@ -402,6 +357,13 @@
      ],
      "prompt_number": 6
     },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "## Concatenate"
+     ]
+    },
     {
      "cell_type": "markdown",
      "metadata": {},