Elementary teachers - I'm a long term sub for an elementary art teacher currently (but am certified in art ed). I recently began using tempera paint with my 4th graders and clean-up typically goes okay, but sometimes is a nightmare (I guess that's everyday though, right?). Usually I just have my students leave their dirty plastic palettes in the sink and I wash them during planning or after school. I just load up a big paint brush with soap and scrub them. It doesn't take too long but my back hurts standing over the short sinks. Is there any better way to do this? Typically I'm a big believer in having students do any job they are capable of doing in order to lessen my work load, however, I find if I let students wash it they either a) take forever b) make a bigger mess or c) don't get them clean enough and paint dries on. Do you let your students wash their palettes or do you do it for them?