Michal, your very thorough explanations are great! Thank you!
A few questions about the liquid tempera/baggie/styrofoam plate system:
Does the stored paint get used by another student in the next class that is
painting, or does it keep for a week until the next class session of that
group, so the same student can use it? I can't imagine it lasting that
long--for me, it would be a week--plus there'd be the whole storage
issue--where do I put it all?! That's be a LOT of paint baggies to store!
If you use it with the next class that paints( so a different student gets
it), do the students clean off the mixing plate before storing it?