I created this as a review for my 7th grade Life Science students after we did a genetics unit (but before the test). I had originally posted the "answer key" so students could check their answers. I found, however, that the students who were struggling were simply copying the answers. So, I came up with idea that they could work through the problems and the answers are "posted as QR" so they can't get out their iPads or phones until I see they have worked through the problem. As they check thro