The following are a set of challenges designed to help students learn the basics of Scratch and programming in general. It also includes how to make some video games and animations.
Shaun’s Game Academy
Aardman Factory ( Wallace and Gromit and Shaun the Sheep creators) has developed five educational modules teaching children how to use Scratch, and is offering prizes for the best games created in two categories: children aged 12 and under, and aged 13 and over.
Other useful links
Scratch tutorials other scratch tutorial based on projects.