I enjoyed reading Realm of Racket (& not embarrassed to say I even learned a few things, like #; for commenting an S-expression). Nice job, all those involved.
I was interested in the note on p.9 that Racket was originally a project that "had middle school students in mind." Suppose I know some middle-school students who are good at math but have no exposure to programming. What book / resource would give them an appropriate foundation to read Realm of Racket?
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