[juliangamble]

Look at Racket (was Dr Scheme) and use the dialect R5RS

http://stackoverflow.com/questions/939582/which-language-in-...

[soegaard]

Use the SICP package for Racket, when you get to the chapters with non-standard functions. For example the chapter on streams and the one about the picture language.

http://planet.racket-lang.org/package-source/neil/sicp.plt/1...