diff --git a/README.md b/README.md
index 68d55d1..ba06a58 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,22 @@
 # ipython-data-notebooks
 Continually updated IPython Data Science Notebooks geared towards processing big data (AWS, Spark, Hadoop MapReduce, HDFS, Linux command line, Python, NumPy, pandas, matplotlib, SciPy, scikit-learn, Kaggle).
 
+## Index
+
+* [kaggle](#kaggle)
+* [spark](#spark)
+* [hadoop mapreduce: python streaming](#aws)
+* [amazon web services](#aws)
+* [python](#python-core)
+* [pandas](#pandas)
+* [matplotlib](#matplotlib)
+* [scikit-learn](#scikit-learn)
+* [numpy](#numpy)
+* [scipy](#scipy)
+* [command lines](#commands)
+* [references](#references)
+* [license](#license)
+
 <br/>
 <p align="center">
   <img src="https://raw.githubusercontent.com/donnemartin/ipython-data-notebooks/master/images/kaggle.png">
@@ -149,7 +165,7 @@ IPython Notebook(s) demonstrating various command lines for Linux, Git, etc.
 
 [Coming Soon] IPython Notebook(s) demonstrating SciPy functionality.
 
-## References
+## references
 
 * [Python for Data Analysis: Data Wrangling with Pandas, NumPy, and IPython](http://www.amazon.com/Python-Data-Analysis-Wrangling-IPython/dp/1449319793)
 * [Building Machine Learning Systems with Python](http://www.amazon.com/Building-Machine-Learning-Systems-Python/dp/1782161406)
@@ -157,7 +173,7 @@ IPython Notebook(s) demonstrating various command lines for Linux, Git, etc.
 * [parallel_ml_tutorial](https://github.com/ogrisel/parallel_ml_tutorial)
 * [Think Stats](http://www.amazon.com/Think-Stats-Allen-B-Downey/dp/1449307116)
 
-## License
+## license
 
     Copyright 2014 Donne Martin