Leo
Thanks to Leo, you had a great time studying. He had made a bunch of cookies, and made a secret run to the store to pick up a bunch of those really good sugar cookies with soft frosting and cheeto puffs. He helped you lay out your notes and quizzed you on everything until he was sure you were going to get all A's.
And thanks to him, you saw that you had passed every final with an A. Except for math, and you made an 89. Stupid math.

Raph
He helped you calm down because you were freaking out about not passing. Even though you were surprisingly good at most of your subjects, you needed to get a B on your English final to pass the class. And you had a really hard time with verbs and adjectives and whatever else there was to it. Raph calmed you down by giving you a large shot of vodka (shh!) and the helped you study.
Thanks to him you got a 87 in English, and a mid-B to a mid-A on all the others.

Donnie
He told you that he was going to help you study no matter what, especially when he saw how close to a panic attack you were. It didn't matter that you were practically the smartest kid in the state, you wanted your grades to be perfect. He brought a bunch of brownies and ice cream for you to much on, and quizzed you on information until your were satisfied.
You were delighted to see 100-110's on all of your tests. Bless your teachers for extra credit and bonus points.

Mikey
You didn't think it was possible, but Mikey was really good at helping you study. You thought that he had a photogenic memory, until he said he was just reading stuff from your notebook and learned it earlier in the year. He made you laugh while quizzing you and brought in special pizza that he had made with French bread loaves.
Thanks to Mikey, you scored high, with high C's and B's.