mastery challenges

I have to finish my 7th grade pie before I go to school tomorrow and I have practiced all my skills! But it is 10:52 at night and I have to wait 3 hours until I can do another mastery challenge to boost my percentage up from a 93% to a 94% and then wait another few hours. My math grade is pretty low right now and I am counting in this to help me raise it back to an A. You see the situation I am in... can you please do something about it? While the topics are still fresh in my mind?! Thx

[Edited by Inger Hohler 05.06.2017]