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1. This works well with elementary children. Make cardboard frames (the
cardboard needs to be stiff) sort of like a large slide frame, which you can
use to look through at the street scene or whatever you are drawing in
perspective....put a rubberband on it from the left side to the right
side....the rubber band should be taut....then the kids look through the
frame, line up the rubberband with the angle of the roof, street or
whatever, and then bring that down to their drawing and that way they get
the angle correct....it teaches them to really "see" the way a roof slants
etc....(by the way, I always hand out the little plastic slide frames (you
can buy them by the box) at the beginning of the year and teach them to look
through it to "compose" their picture when looking at a still life,
landscape or whatever...its handy, doesn't take up room, is cheap, and
really helps in composition....
2. Make a clock on a sheet of see-through plastic.....The kids should
identify what angle something like a roof top is, by saying that is a four
o'clock angle.....that is an eight o'clock angle....after a while they can
mentally form the image without using the plastic clock.....it really
I know the above methods aren't very mathematical, but the elementary school
kids they are very visual and work well..