I’m so sorry, it’s not supposed to. Don’t try to get it all figured out this week. 🙂
So, yes, if you plan 3 hours for school but it takes 3.5 because you need the extra 30 minutes, then so be it. It would come out of something else, like you suggested sewing etc. It’s a guideline, not a task master. It’s to help keep you focused, not to create stress.
If you find that school is taking you 3.5 hours everyday you may want to re-figure your list. But you’ll want to do that about twice a year anyway. If you just have that much work to get through then you’ll need that time, if you’re dealing with disobedience or laziness though, you may want to keep 3 hours for school, but 30 minutes for training 😉