Discovery Education.com is a teaching and learning platform with plenty of video resources, lesson plans, worksheets and tutorials. Some resources are free, like the videos and worksheets at the HOME RESOURCES section where kids can learn numbers and number operations , Science, English, or topics realted to Social Studies. There are also some free authoring tools available which let teachers edit their own puzzles and games for class use.
Other services require a fee registration. However, you can try the 30 day trial period. I liked the way the videoteque was organised and the possibilities to edit your own lesson plan and share other teachers’ plans. It’s worth a visit.