Black, white and the paper in the middle...

One of the most effective ways of teaching our young pupils how to observe light and shadow when looking at three dimensional objects and then how to reproduce that observation onto a drawing is the following:

 - Use black and white drawing materials (chalk and charcoal work very well)
 - Work on coloured paper (make sure the colour is lighter than the black and darker than the white material you draw with).
 - Draw only the darkest shadows and the lightest spots of light.
 - Always leave paper in between the black and the white.

 Et Voilà!

A series of drawings by year 8 students (I swear!):