@glin23
I am an online instructor. I use a combination of PowerPoints, websites and whiteboard in my chats with my students. I find the opposite to be true of sharing PowerPoints. I find that if I post my presentations to the students, I then receive less participation in chats. I use the PowerPoint as a supplement to my discussion with my students. You also have to be careful with sharing your PowerPoints. If you are not using an original creation you cannot post a book generated presentation because of a copyright issue.