В кратце, MIT заменили cхему на питон в своем курсе "6.001 Structure and Interpretation of Computer Programs":
http://www.wisdomandwonder.com/link/2110/why-mit-switched-from-scheme-to-python
http://blog.snowtide.com/2009/03/24/why-mit-now-uses-python-instead-of-scheme...