diff --git a/graphs_trees/templates/__init__.py b/graphs_trees/templates/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/graphs_trees/templates/foo_challenge.ipynb b/graphs_trees/templates/foo_challenge.ipynb
deleted file mode 100644
index e56372d..0000000
--- a/graphs_trees/templates/foo_challenge.ipynb
+++ /dev/null
@@ -1,135 +0,0 @@
-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "This notebook was prepared by [Donne Martin](https://github.com/donnemartin). Source and license info is on [GitHub](https://github.com/donnemartin/interactive-coding-challenges)."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# Challenge Notebook"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Problem: Implement foo(val), which returns val\n",
-    "\n",
-    "* [Constraints](#Constraints)\n",
-    "* [Test Cases](#Test-Cases)\n",
-    "* [Algorithm](#Algorithm)\n",
-    "* [Code](#Code)\n",
-    "* [Unit Test](#Unit-Test)\n",
-    "* [Solution Notebook](#Solution-Notebook)"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Constraints\n",
-    "\n",
-    "* Does foo do anything else?\n",
-    "    * No"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Test Cases\n",
-    "\n",
-    "* foo(val) -> val"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Algorithm\n",
-    "\n",
-    "Refer to the [Solution Notebook]().  If you are stuck and need a hint, the solution notebook's algorithm discussion might be a good place to start."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Code"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [],
-   "source": [
-    "def foo(val):\n",
-    "    # TODO: Implement me\n",
-    "    pass"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Unit Test"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "**The following unit test is expected to fail until you solve the challenge.**"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [],
-   "source": [
-    "%load test_foo.py"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Solution Notebook\n",
-    "\n",
-    "Review the [Solution Notebook]() for a discussion on algorithms and code solutions."
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 2",
-   "language": "python",
-   "name": "python2"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 2
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 0
-}
diff --git a/graphs_trees/templates/foo_solution.ipynb b/graphs_trees/templates/foo_solution.ipynb
deleted file mode 100644
index 3aaf5c5..0000000
--- a/graphs_trees/templates/foo_solution.ipynb
+++ /dev/null
@@ -1,167 +0,0 @@
-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "This notebook was prepared by [Donne Martin](https://github.com/donnemartin). Source and license info is on [GitHub](https://github.com/donnemartin/interactive-coding-challenges)."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# Solution Notebook"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Problem: Implement foo(val), which returns val\n",
-    "\n",
-    "* [Constraints](#Constraints)\n",
-    "* [Test Cases](#Test-Cases)\n",
-    "* [Algorithm](#Algorithm)\n",
-    "* [Code](#Code)\n",
-    "* [Unit Test](#Unit-Test)"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Constraints\n",
-    "\n",
-    "* Does foo do anything else?\n",
-    "    * No"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Test Cases\n",
-    "\n",
-    "* foo(val) -> val"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Algorithm\n",
-    "\n",
-    "Return the input, val\n",
-    "    \n",
-    "Complexity:\n",
-    "* Time: O(1)\n",
-    "* Space: O(1)"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Code"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [],
-   "source": [
-    "def foo(val):\n",
-    "    return val"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Unit Test"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 2,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Overwriting test_foo.py\n"
-     ]
-    }
-   ],
-   "source": [
-    "%%writefile test_foo.py\n",
-    "from nose.tools import assert_equal\n",
-    "\n",
-    "\n",
-    "class TestFoo(object):\n",
-    "\n",
-    "    def test_foo(self):\n",
-    "        assert_equal(foo(None), None)\n",
-    "        assert_equal(foo(0), 0)\n",
-    "        assert_equal(foo('bar'), 'bar')\n",
-    "        print('Success: test_foo')\n",
-    "\n",
-    "        \n",
-    "def main():\n",
-    "    test = TestFoo()\n",
-    "    test.test_foo()\n",
-    "\n",
-    "    \n",
-    "if __name__ == '__main__':\n",
-    "    main()"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "metadata": {
-    "collapsed": false
-   },
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Success: test_foo\n"
-     ]
-    }
-   ],
-   "source": [
-    "%run -i test_foo.py"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 2",
-   "language": "python",
-   "name": "python2"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 2
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 0
-}
diff --git a/graphs_trees/templates/test_foo.py b/graphs_trees/templates/test_foo.py
deleted file mode 100644
index 8380e56..0000000
--- a/graphs_trees/templates/test_foo.py
+++ /dev/null
@@ -1,19 +0,0 @@
-from nose.tools import assert_equal
-
-
-class TestFoo(object):
-
-    def test_foo(self):
-        assert_equal(foo(None), None)
-        assert_equal(foo(0), 0)
-        assert_equal(foo('bar'), 'bar')
-        print('Success: test_foo')
-
-        
-def main():
-    test = TestFoo()
-    test.test_foo()
-
-    
-if __name__ == '__main__':
-    main()
\ No newline at end of file