diff --git a/README.md b/README.md
index 4fdd1c7..99af939 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,15 @@
 # ipython-data-notebooks
 IPython Notebooks geared towards Python data analysis (core Python, NumPy, pandas, matplotlib, SciPy, scikit-learn, command line).
 
-## core
+## python-core
 
 IPython Notebooks demonstrating core Python functionality geared towards data analysis.
 
-* [data structures](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/core/structs.ipynb)
-* [data structure utilities](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/core/structs_utils.ipynb)
-* [functions](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/core/functions.ipynb)
-* [datetime](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/core/datetime.ipynb)
-* [unit tests](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/core/unit_tests.ipynb)
+* [data structures](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/python-core/structs.ipynb)
+* [data structure utilities](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/python-core/structs_utils.ipynb)
+* [functions](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/python-core/functions.ipynb)
+* [datetime](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/python-core/datetime.ipynb)
+* [unit tests](http://nbviewer.ipython.org/github/donnemartin/ipython-data-notebooks/blob/master/python-core/unit_tests.ipynb)
 
 ## pandas
 
diff --git a/core/__init__.py b/python-core/__init__.py
similarity index 100%
rename from core/__init__.py
rename to python-core/__init__.py
diff --git a/core/datetime.ipynb b/python-core/datetime.ipynb
similarity index 100%
rename from core/datetime.ipynb
rename to python-core/datetime.ipynb
diff --git a/core/files.ipynb b/python-core/files.ipynb
similarity index 100%
rename from core/files.ipynb
rename to python-core/files.ipynb
diff --git a/core/functions.ipynb b/python-core/functions.ipynb
similarity index 100%
rename from core/functions.ipynb
rename to python-core/functions.ipynb
diff --git a/core/hello_world.txt b/python-core/hello_world.txt
similarity index 100%
rename from core/hello_world.txt
rename to python-core/hello_world.txt
diff --git a/core/structs.ipynb b/python-core/structs.ipynb
similarity index 100%
rename from core/structs.ipynb
rename to python-core/structs.ipynb
diff --git a/core/structs_utils.ipynb b/python-core/structs_utils.ipynb
similarity index 100%
rename from core/structs_utils.ipynb
rename to python-core/structs_utils.ipynb
diff --git a/core/tests/__init__.py b/python-core/tests/__init__.py
similarity index 100%
rename from core/tests/__init__.py
rename to python-core/tests/__init__.py
diff --git a/core/tests/test_transform_util.py b/python-core/tests/test_transform_util.py
similarity index 100%
rename from core/tests/test_transform_util.py
rename to python-core/tests/test_transform_util.py
diff --git a/core/tests/test_type_util.py b/python-core/tests/test_type_util.py
similarity index 100%
rename from core/tests/test_type_util.py
rename to python-core/tests/test_type_util.py
diff --git a/core/transform_util.py b/python-core/transform_util.py
similarity index 100%
rename from core/transform_util.py
rename to python-core/transform_util.py
diff --git a/core/type_util.py b/python-core/type_util.py
similarity index 100%
rename from core/type_util.py
rename to python-core/type_util.py
diff --git a/core/unit_tests.ipynb b/python-core/unit_tests.ipynb
similarity index 100%
rename from core/unit_tests.ipynb
rename to python-core/unit_tests.ipynb