To use any github repository there are two great ways to do it:

1.  If you have a github account (go get one!! they are free!), then you can "fork" the repository.
	a. sign into your account
	b.  search for the repo you want
	c.  fork it (top right of screen, see the "fork" option
	d.  It will show up as a repository in  your repositories area

2.  If you don't have git hub (or if you do, this option goes either way):
	a.  search for the repo  you want
	b.  click the big green "clone or download" button
	c.  save the .zip file to your desktop

here are some popular repos on numpy and pandas (look at how many times they have been forked!)

Jupyter 

Jupyter tips and tricks:
https://github.com/jbwhit/jupyter-tips-and-tricks


Python

Python Cheat Sheet:
https://github.com/juliangaal/python-cheat-sheet

Python Tutorial (everything from constructors, to loops to if statements
https://github.com/hussien89aa/PythonTutorial


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NumPy
NumPy Tutorial
https://github.com/rougier/numpy-tutorial

Beautiful overview of Python NumPy
https://github.com/rougier/from-python-to-numpy

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Pandas

Everything Pandas/Toolkit
https://github.com/pandas-dev/pandas

Most EXCELLENT Pandas Exercises:
https://github.com/guipsamora/pandas_exercises

Pandas Q & A Video Series
https://github.com/justmarkham/pandas-videos