"What are the best free apps for teachers?
... we’ve taken a wide-lens view of the modern teacher and taken a stab at what might be considered 50 of the best really, truly actually free apps available for iOS. They may have some paid options, but they’re each entirely useful without spending a penny.
While we do look at music, health tracking apps, and other teachers-as-a-human-being apps, we focus mostly on the kinds of digital content that will help you teach more effectively to a wider range of students in more compelling and dynamic ways than ever before. All free."
Via John Evans