Drawing Lessons For Children

I am a teacher of drawing / painting lessons for primary school children ... nobody knows a good education reference books / ....... or perhaps a website? I would like to focus on "how" to draw and paint, rather than just art and craft projects.

I looked around Google and all and I found a site with guidelines and everything you need. I think it might help.

http://research.universalclass.com/i/research/13135-syllabus.htm