We found 5 Reddit comments about Wizard's Hall. Here are the top ones, ranked by their Reddit score.
Wizard's Hall, Jane Yolen? [Amazon link] (https://www.amazon.com/Wizards-Hall-Jane-Yolen/dp/0152020853)
I'm going to be the guy that goes out on a limb and says Harry Potter. But maybe perhaps it's this one instead: http://www.amazon.com/Wizards-Hall-Jane-Yolen/dp/0152020853
Wizards Hall, it was a book that I loved in the fourth and fifth grade. Not to difficult to read and is not overly immature.