Here are some tips (That have gotten me through school)
1: Edumacation is the most important in your whole life, you have lots of time to goof off with your buddies, egg houses, pegg cars, random as shit, ect. But, only one shot at edumacation so take it seriously! If you don't get it now you will never get it.
2: Find out the smartest person in your class, make friend with him/her ask them if they can explain in your own words.
3: The MOST IMPORTANT IF ALL FAILS CHEAT! CHEAT CHEAT! IF YOU GET CAUGHT NEVER ADMIT TRUST ME... IF YOU DO JUST MAKE SOME BS UP AND START CRYING THEY FEEL BAD FOR YOU AND LET YOU OFF WITH A WARNING OR 50% DON"T BE A PUSSY SHOW THEM YOUR TEARS TRUST ME IT WORKS!
Note: This is not a joke. We'll not all of it.