There’s no community for school so I thought I’d ask here

Basically at my school we don’t have much homework and we do almost all the assignments/projects in class. But I’m so slow that I can’t possibly complete whatever we have to do in only 20-45 minutes, so I have to continue at home. But sometimes we can’t do that and have to turn in at the end of the class, and by then I’ve only barely started. I seem to work more efficiently at home though (or at least I feel like I’m working more efficiently).

Does anyone have any advice/tips to help mitigate this? Tia