If its not Math its all about the hand signals..assuming its multiple choice.
A=1
B=2
C=3
D=4
Throw up the number of the question followed with a 1,2,3, or 4 for the answer.
If its Math, its all about the caculator. In highschool i would type in whole tests and quizzes in my caculator.
My math teacher in Highschool would always let you finish the test the next day if you didnt finish it. So i would do everything i knew. Type all the questions in that i didnt know. Do them that night, then type the answers into my calc for the next day.