The main shenanigations I can think of, off the top of my head, is the year that nobody talks about because of a potions accident wherein Ashlee, Greta, and Victoria exploded the potions lab and were thus barred from ever working together in potions. (Cassadee is a good witch, kind of Ron-like, talent-wise, but the girl can melt a cauldron in five minutes flat.)

HE TOTALLY IS. HE LECTURES PEOPLE TEN YEARS OLDER THAN HIM ABOUT PROPER PROCEDURE. And then finds creative ways around it.

And they are! Think...the Potters, basically.