Although YouTube has been blocked from many/most schools, for obvious reasons and not so obvious ones. YouTube does provide great resources and content for teachers and students. View the list of the Top 100 Videos for Teachers. This list is provided by SmartTeaching.org, a leading online resource for current teachers, and aspiring education students and student teachers.
The Center on the Developing Child at Harvard University was founded in 2006 on the belief that the vitality and sustainability of any society depend on the extent to which it expands opportunities early in life for all children to achieve their full potential and engage in responsible and productive citizenship.
I watched a great video on executive function; the site seems to have a lot of brain related research info and other videos.
Screenr is an online screen-capture recorder that captures everything that happens in your screen. Easy tool for students and teachers alike Screencasts are very easy to share and download Possible to log in via social networks Students can do the voice-over of on-line videos (e.g. snippets of films, documentaries, news, etc.)
Educreations is a community where anyone can teach what they know and learn what they don't. Our software turns any iPad or web browser into a recordable, interactive whiteboard, making it easy for teachers and experts to create engaging video lessons and share them on the web.
This tool makes it possible to really delve into a student's thinking/problem solving process. Looks interesting.
Share what you make with the world. I have only explored this site a bit, but it looks like a kids paradise. Rather like pinterest, kids can post projects they've made in photo or short video clip format. Viewers can then give them stickers to rate them. Lots of possibilities on a rainy day at home.