Showbie is a free educational app for teachers and students that makes creating and completing assignments, providing assessments, and storing grades easy.

Source: Showbie – The Heart of Your Paperless Classroom

If you are in an iPad classroom, Showbie may be a site you’ll want to check out. As a teacher, you can assign tasks to students, collect the assignment, and then provide feedback, all in the app. Feedback can be given by text or by voice.