Consider also Racket scheme! Has a great starter IDE, an absolute barebones teaching variant that exposes the minimum amount of primitives required to do comput

Consider also Racket scheme! Has a great starter IDE, an absolute barebones teaching variant that exposes the minimum amount of primitives required to do computations, a repl, as well as a typed variant. Has braces for scope, extremely clear error messages with literal arrows tracing exceptions through your code, and is quite amenable to terminal prompt assignments.