Great resources to have on hand for leading PDH sessions on various topics. I particularly love the "Learning through Mistakes" TedTalk 12 Must Watch TED Talks for Teachers ~ Educational Technology and Mobile Learning
The Starfish Story is a great product for back to school. This poem adapted from Loren Eiseley& work, is a perfect way to spread inspiration and motivation to your colleagues, staff or students in your class.
Bulletin board idea that aligns with and It's simple - you have the kids choose five colors they want to use on their kite grid. After, on the ribbons, they have to find what fraction of the kite is the corresponding color.