The classic Superboy stories always have Clark find something else on Earth that arrives from Krypton. Which is fine, if you don't take it so seriously, but if I could clean it up I'd have it all come from the rocketship he came in, so there isn't all this other stuff that conveniently manages to survive Krypton's destruction. Thus the super-teacher would be part of the rocketship--the computing system and AI program that gives him instructions.