I wasn't expecting to trigger old memories with this, but, heh, I see what you mean. Jan will need help, but in his case it's because of cultural differences and gaps in his knowledge. At this point he can read and write just fine, though his penmanship is pretty weird--the Fraggle writing we've seen is very vertical. He can do basic math, but geometry and simple algebra are utterly beyond him. And, of course, his knowledge of history, science, citizenship, etc is nil. He's gonna have a fun time earning that GED.
Fortunately, Janken's very good at making friends. He'll need 'em to keep his sanity. It's probably obvious who one of those friends will be.