Resource: How To Use Google Sites and PowerPoint
This How-To guide will help users learn in detail the different features on Google Sites and in PowerPoint. There are visual as well textual aids to help the user understand the various aspects of both programs.
Resource link: Music Theory 
Learn and practice music theory through exercises. You can also review concepts about music theory. This website contains worksheets, lessons and resources for enhanced learning.
Link: Art 21 
Learn about a variety of artists through text, interactive media and video. There are documentaries on the website which include artists and art movements