Tap to Learn produces a bunch of educational apps for Android and iOS. The Tap to Learn Grammar app for Android offers more than 200 self-paced grammar lessons. The lessons don't have videos embedded in them, but there are links to external videos hosted on YouTube. After working through a lesson students can test their new skills in a series of quizzes. Instant feedback is provided in the skills quizzes within Tap to Learn Grammar. The free app records and tracks students' progress for them.
Applications for Education
Using Tap to Learn's Grammar app isn't a revolutionary approach to learning. That said, if you're looking for an Android app that your students can use to practice and track their progress in developing their grammar skills.