This may be as close to playing a piano as it is possible to get without actually having a physical instrument in the class. Learn the names and sounds of keys, play a solo or a duet, and practice scales or any song you'd like–all for free!

Amateur seismologists explore Earth's earthquakes in real time using a variety of map styles and parameter selections.

Learners who struggle with grammar, foundational reading skills, and sentence composition can learn how to write proper sentences using an app that relies on research-based practice. It uses a color-coded formula that had been proven to...