#4 MIT OpenCourseWare

The site’s motto says, “The idea is simple: to publish all of our course materials online and make them widely available to everyone.”

MIT OpenCourseWare (MIT OCW) is an initiative of the Massachusetts Institute of Technology (MIT) to put all of the educational materials from its undergraduate- and graduate-level courses online, partly free and openly available to anyone, anywhere. MIT OpenCourseWare is a large-scale, web-based publication of MIT course materials. The project was announced in October 2002 and uses Creative Commons Attribution-Noncommercial-Share Alike license.

#3 Learn Python the Hard Way

Learn Python the Hard Way offers free PDFs and if you want to take the video version of the course, you'll need to pay up US $29.

In this context, ‘Hard Way’ means, you can't copy-paste; you must type out each of the lessons in order to teach your hands the language.

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