I was introduced to this app this summer when I was at the teacher store about to by an EZ Grader for $7.00. My friend said you know there is app for that! So of course I didn't buy it because this app is free! Groovy Grader is a very easy to use grader. All you have to do is type in the amount of questions and it tells you the grade for the number of questions the students missed. It's free and easy to use, its definitely for me!