> A language like Racket is great for teaching because it lends itself to exploring so many core concepts: complexity of algorithms, functional programming techniques, recursion, data structures, etc. ...

>I don't really think Python is very good for illustrating either the theoretical or the systems-level CS concepts. It's a nice language for motivating programming and showing off how much you can do with little serious investment, but it doesn't really motivate learning Computer Science, i.e. learning Programming on a 'deeper' level.

Could you explain what you mean by Racket lending itself to algorithm complexity, recursion, etc better than Python? I really don't see why one or the other is more conducive in this respect.