These are tools teachers can use in creating digital lessons.
Ed Puzzle is a tool that allows you to use videos and add questions, voice overs, and discussion tools that appear as the video plays. It can prevent students from moving ahead in a video if they don't answer the question first. This is an easy tool to learn and to use and doesn't require a whole lot of prep.
Wizer is a great place to create interactive activities for students. The free version is robust. The paid version is what I consider a good deal if you want to differentiate blended learning. It is easy to learn and use.
Wizer Blog with how-to information.
Article about hyperdocs on Ditch That Textbook.