Links to exciting Scratch resources: 

Getting started guide: http://info.scratch.mit.edu/sites/infoscratch.media.mit.edu/files/file/ScratchGettingStartedv14.pdf

Video tutorials: http://info.scratch.mit.edu/Video_Tutorials

Scratch reference guide: http://info.scratch.mit.edu/sites/infoscratch.media.mit.edu/files/file/ScratchReferenceGuide14.pdf

http://inst.eecs.berkeley.edu/~cs10/su11/

http://sage.cs.berkeley.edu/course/view.php?id=5

http://www.cs.harvard.edu/malan/scratch/index.php

http://pages.cs.wisc.edu/~dusseau/Classes/CS202-F11/schedule.html

http://pages.cs.wisc.edu/~dusseau/Classes/CS202-F11/homeworks.html