FlipGrid.com (allows a teacher to post a written prompt, and then students upload video responses)
Noteflight.com (free online music notation tool)
Trainer.ThetaMusic.com (online music theory computer games)
RapAnalysis.com (rap music analysis)
Top40Theory.com (pop music analysis)
MusicTheoryBridges.wordpress.com (analyses of popular music)
Artusi (making their music theory software available for free for this semester to any institution required to move to all online instruction because of Covid-19)
So You Need To Teach Online: Music History and Music Theory Edition
Teaching Theatre Online: A Shift in Pedagogy Amidst Coronavirus Outbreak
15 Broadway Plays and Musicals You Can Watch On Stage From Home
Online Art and Design Studio Instruction in the Age of “Social Distancing”
Lunch Doodles with Mo Willems - Kennedy Center Artist in Residence at Home
Ultimate Guide to Virtual Museum Resources, E-Learning, and Online Collections
Google - Arts and Culture - Go on free virtual tours of well-known museums and landmarks around the world and get a closer look at famous pieces of art