Coding View - Coding View is live collaborative coding environmentdesigned for technical phone interviews. It features web version of Visual Studio Code, as well as access to real terminal. It has a built-in compiler for most popular programming languages.
Treehouse - Treehouse is an award-winning online platform that teaches people how to code.
codebunk - Realtime Collaborative Editor with Code Execution, REPLs and Chat
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Google Classroom - Learning management tool by Google
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.