I have spent a good amount of time prepping items in the classroom. One of the things I have done is cut out clear contact paper for an activity that the teacher had planned the next day. I have also graded papers for the teacher and put them back into the student's binders. I have set out papers at different stations while the students were at recess so the teacher could start the next activity as soon as the kids came in from recess. This made me realize that parent involvement is so helpful for a teacher. A good teacher does a variety of activities, but I don't think it would be possible to get to all of the activities if you didn't have help doing the prep work for them. If parents would realize that helping for even 20 minutes means that their student gets to have more hands on activities, I think more parents would be likely to offer their help.