Wikis are a great tool to help a school enrich instruction, and increase communication and collaboration among staff. They are also free (for educators
Curriki, the online education community, is building the first website to offer free, open-source instructional materials for K-12. We have thousands of free worksheets, lesson plans, exams, project ideas and activities for English language arts, math, science, social studies, technology integration and other subjects. All of our educational material is contributed by teachers and partners and is free and open source.
British - Search for videos from a number of sources including YouTube - Of course, you'll need to preview to make a selection. There is a wide variation in results. Certainly worth looking at. Not to be limited by the title "Primary"