Easy Grade is a free app for teachers that makes it easy to grade student work (vs using the cardboard EZ Grader). It is easy to use and even lets you grade with 1/2 points.
Here are some features:
- you can adjust how many questions are on the test with a quick tap
- you can choose whether you want to calculate grades on the number of questions/problems your student got incorrect or the number they got correct
- you can increase or decrease the text size to fit more or less on the screen.
Disclaimer: Easy Grade is a paid advertiser