Hi!
You can take new students only at the beginning of each year. So you should wait for the next year or start a new game.
thank you, I started again and now my school has 45 students and everything is working fine.. I have one question however.. what should I do to build second level? I put the stairs etc but the builders are not going upstairs to build the floor
I don't know how your school looks like, but remember to have some space above stairs. Maybe ceiling is just to close to stairs.
