This app could be a great review for a basic physics class. It includes a study guide and covers most common units such as motion, vectors, energy, and optics.
Vernier offers a host of products to support physics instruction, and for $2.99 there is now an app. Students can perform hands-on experiments and collect real-time data through the iPad.
For any student interested in Astronomy, this is a very cool app. It is also a great experience with augmented reality and could be used as a way to spark ideas about other content as well.
Though this version of the app doesn't have as many features, it's free! With an iPhone or iPad, students can create time lapse recordings so as to improve observational skills, document a laboratory, or create a digital story.
This is a great app for students doing field research. Not only does it help identify a leaf, but it also puts a variety of information at students fingertips.
iNaturalist is a web site, and an app, for sharing pictures and observations of plants and animals. Thanks to Richard Byrne at Free Tech for Teachers for posting!