Music Theory Resources
Free music theory lessons and quizzes on topics such as naming notes on the treble clef, key signatures, intervals, etc.
Super cool website that can be used to learn about theory through a more practical, experiential lens.
Create your own music by mixing and matching beatboxing tracks from 7 different "atmostpheres". You can use the web-based version (it's FREE) or download the app for any device ($4-5 depending on the platform).
Create a beat block by choosing when you want each sound to play. This website uses an easy-to-see layout where each box represents a beat, allowing you to have control over the rhythms and patterns you use.