Best tip you'll ever get when asking about which tablet to get for school. NONE.
I suggest trying to take notes on your iPhone or android phone for a whole week, then next week use a laptop. I guarantee that your iPhone can do just as much or 99% of the stuff iPads can do.
You might think tablets are more convenient but they aren't, you can't do half the stuff most classes would ask for unless you're in elementary LOL The only thing you could really do on an iPad or other tablet is notes but if you want to edit documents and do homeward on your iPad or tablet, you better think twice. If they do work, expect to take twice as much time doing it compared to a laptop.
I love MacBooks but i HATE apples tablets, they are just an oversized iPhone.Tablets are useless IMO, sure they look "good" but they are horrible for school.