A team of students and a teacher at the UMassAmherst College of Education have created a 4 week long open online course on digital media in education. The course has its own website and a Google + community.
I have enrolled in this course in just a few easy steps, and its open access to anyone. Today, Week 2 started, but the course has Week 1 materials available and the only firm deadline for completing the assignments is the end of the course, December 7th, 2015.
The activities are there to help “explore, evaluate, and choose digital media tools for use in your own classroom.” I would recommend it both to beginner and advanced users of digital media. It suggests and teaches many useful tools, so this could be a good starting point if you have thought about using digital media in your classroom.