Scratch

Hi Community,
I need the largest possible number of good educational projects developed with Scratch. I know of a fair number of nice educational projects and good educational authors but I need the most comprehensive list that I can put together with your help. I need projects about all the classic school topics, like:

- language (all languages)
- math and physics
- science and technology
- history and geography
- arts and music

I need projects for all K-12 grades. English projects are better, but also other languages are fine as soon as the topic of the project is clear enough even if I can't understand words/labels.

So, if you know of good projects, please post their URLs (or just the name of the project if you don't remember the URL).

Thanks a lot in advance!!!!!!