This is interesting. I’ve been using the “fluent forever” method to learn a second language and one of the things it really stresses is the importance of immediate feedback. It makes perfect sense - it’s much easier to understand your mistake and correct it in the moment. But I’d never thought about it in the context of homework. It almost seems silly that we expect kids to wait a full 24 hours or more to find out whether they’ve done a math problem correctly or not.