Common Core Quest is an excellent free Android app for Math & LA grades 6th on up, and aligned to Common Core Standards. This app allows students to take practice quizzes to learn a large variety of concepts such as: functions, fractions, graphs and more. Also, it tracks student progress as well as show the incorrect answer w/ links to walkthrough videos and games. Students can then earn badges/ribbons for learning a Common Core Standard and teachers/parents can get detailed reports.
I highly recommend checking out Common Core Quest by clicking here!!!
For my Pinterest board on Educational Android Apps click here.
Below is a brief demo...