What printing/prep do instructors need to do for Biology Level C co-op?

The preparations the instructor needs to do each week are:

(a) make sure they have lab supplies;

(b) print out materials (quizzes, research questions, lab and/or guidebook pages if needed; however, if the instructor has parents purchase the lab guide and guidebook, this printing would be unnecessary);

and (c) grade quizzes, research questions, and/or lab reports.