Ah, that wasn't there when I replied.

I do understand the dilemma. I work at a K-12 and the office next to mine is where they put together the science lab kits for students. It takes a fair bit of understanding to do that correctly sometimes, and that preparation work is some knowledge the students seem to miss out on in order to get to the subject matter. My coworker has mentioned on more than one occasion that with certain modules it feels like she does most of the work and the students just do the final step.