This app allows teachers to easily and quickly grade multiple choice questions by simply taking a picture of it with your iPhone or iPad.
Table of Contents:
00:08 - Creating a Class
00:43 - Adding a Student
01:16 - Creating a Quiz
02:11 - Scanning the Papers
03:14 - Review Papers
06:29 - Printing Answer Sheets
Source: Thomas Grodek's YouTube page
Here are PDFs of the answer sheets for ZipGrade. This PDF has 20 questions on one page.
Source: http://www.zipgrade.com/forms/
This is two 20 question answer sheets on one page.
Source: http://www.zipgrade.com/forms/
This has the possibility of having at most 50 questions and a student ID.
Source: http://www.zipgrade.com/forms/