Have you tried Flubaroo? Never grade student tests or quizzes by hand again. Use a Google Form and let Flubaroo do the rest. It really is that easy. Flubaroo recently had a new update that will be even more beneficial to Math and Science teachers. Check out these links.
HOW TO CREATE A FORM AND USE FLUBAROO VIDEO
WHAT IS FLUBAROO AND HOW TO USE IT - By Eric Curts
NEW UPDATES TO FLUBAROO
Start using Flubaroo with your students and eliminate all those hours grading tests and quizzes.