DrRacket defaults to the full Racket language. You have to switch over to use the teaching languages or the r*rs implementations, but Racket is there from the o

DrRacket defaults to the full Racket language. You have to switch over to use the teaching languages or the r*rs implementations, but Racket is there from the off, and switching languages is as easy as editing the #lang line at the top if you don't feel like arsing around with the GUI for it.