Oh boy! Insert Learning just recently added the ability for a teacher to join classes! This is awesome news as it brings interactivity to Reading articles for PD
Insert Learning is basically a chrome extension that allows you to make anything on the web an assessment or a discussion. You can highlight, add sticky notes, start discussions, and add questions. What they did recently was the ability for teachers to join classes. Through that teachers can use it for PD. It's now an awesome tool for teachers to use in the classroom and to learn.
Check out Insert Learning HERE