I keep saying I'm going to dump my 7th and 8th grade sketchbooks but I don't.
I keep them around because if someone finishes a step early, I allow them to
work on the homework during classtime. I also have extra credit assignments
for when they finish early. I tell them they will always have some art to work
on. When I first started they were used to getting a lot of free time and even
free periods from the former (now retired thank god) art teacher.