Posted: November 15, 2016
http://www.learnpython.org/
https://codecombat.com/
https://www.codecademy.com/
https://inventwithpython.com/
http://www.skulpt.org/
https://groklearning.com/learn/hoc-flags/hoc-flag/0/
http://interactivepython.org/runestone/static/StudentCSP/CSPrinTeasers/computeTurtles.html
https://docs.python.org/2/library/turtle.html
