Not a teacher, but a senior in HS. I guess I have some tips. I recommend NOT giving them any KA to do, but allow them to do it freely in their grade level. If they don't do at least 2 SUBJECTS a WEEK, maybe give them a make up week or 4 for the next week. If a class does 200 subjects in a year, throw a pizza party or something. Kids love pizza! Good luck, and have fun teaching!