Are you looking for music for your classes that are safe and school-appropriate? Then you must download this free app from Shape Up US. It is available on both the Apple Store and Google Play.
https://play.google.com/store/apps/details?id=com.nobexinc.wls_7758334379.rc
https://itunes.apple.com/us/app/shape-up-radio/id1408844105?mt=8