I have a five gallon paint bucket with an air tight lid. I use Ross art
paste. You mix it w/ one gallon of cold watre, stir for 5 minutes, then let
it sit for 15, then stir again. I stir with a wire whisk like for scrambled
eggs. I can make about 3 packages' worth, it never goes bad. I distribute it
2 lg ricotta cheese containers worth, into half of milk jug gallons w/ tops
cut off, INSIDE of aluminum baking pans. This prevents drip. Each table gets
a box of pre cut paper strips. This way all the materials are right there.
ALWAYS demonstrate how to make an "l" with your thumb and pointer finger,
turn sideways, run down the strip,OVER THE MIX BIN to prevent drippage and
excessive mix on strips. I always say, "slick, not drippy".
This works like a charm.
Have used this system with kids as young as k.
Hope this helps.
Christine. from Binghamton
Where there is a will, there is a way to organize the materials for it, so
that things are as structured as possible. An art teacher's best friend is to
have procedures for everything!!!!