I have a great app that you've got to add to your iPhone! It's the Magic Grader! It's a grading slide like the one you buy at the start of every school year and end up losing somewhere in your room before December. (I never wind up finding it either!) It's only 99¢. I've had this on my phone all year and I love it! The best part is that it was created by a student in my district. His mom is a teacher! I just love that!