Maths Test: Use a calculator
Spelling Test: Use a dictionary
English Test: Use the answer book
Science Test: Use the answer book
History Test: Use the text book
Any test: Get Stephen Hawking to do plastic surgery to look like you, claiming it will help him move again.
Download testbot.exe on your brain mainframe and you will be good to go.
Bribe the teacher
Use your sharingan/byakugan/rinnegan
Use your "eyescream"