I just discovered a wonderful and free resource on Scholastics website that can provide extra professional development for teachers. The site is called Teacher Talks. Educational experts are invited to give free webinars to teachers about different education topics. You are able to sign up and join in the webinar if you would like, the cool thing is these webinars are then posted for teachers and others to revisit.
Below is the lick to the site and then I have listed the links to some of my favorites