Teaching Mathematics is a course of videos and demonstrations designed for middle school math teachers, from the Virginia Department of Education. They are free to download from iTunes.
This website links to dozens of interactive games and activities that you can use on classroom computers or SMARTboards. Most activities are for grades K-5.
Make sure to check out the top level page of
"Apps in the classroom"
for more app suggestions and tutorials
Learning patterns helps with social, cognitive, motor skills, and mathematics.
This website from the Ontario Ministry of Education and TFO provide elementary teachers with lesson plans, activity sheets, and many other resources. It also includes information about healthy schools.
Wonderopolis is "a place where wonder and learning are nurtured through the power of discovery, creativity and imagination."
There is a new wonder everyday which students can learn about in a fun and interactive way.
The site also includes activities and advice for students, parents, and teachers.