I have a lot of information about African masks in my lesson on
African art:
http://www2.wcoil.com/~mdecker/afr-less.htm
Most of it was from a research project I did on Art of Mali.
Those who are interested in lesson plans will find lots out there just
by entering "Mask lesson plans" ( http://vivisimo.com/ )...and
speaking of masks....just in case Mark A. is wondering....you are
still on my "to-do" list.