What drives a great lesson?

Interesting article :)

http://www.edutopia.org/blog/questions-answers-drive-great-lesson-richard-curwin?utm_source=SilverpopMailing&utm_medium=email&utm_campaign=081915%20enews%20ibl%20ngm%20remainder&utm_content=&utm_term=top1&spMailingID=12173425&spUserID=MTc3NzI3NzM5Mjc3S0&spJobID=601358453&spReportId=NjAxMzU4NDUzS0