I gained the most from the section about handling restlessness or inadequate backgrounds in students. I see it quite a bit, and it pains me to watch students struggle through a course due to poor or lack of advising or thinking they were prepared to take my lab courses. I saw it right away, and have since taken the initiative to add prerequisites to my lab course that would solidify their skills before they reach my labs. I'll be using pretests this coming fall. I had always struggled with making lessons that fit everyone of a wide range of skill levels, which I've learned isn't feasible for my particular courses. So utilizing pretests sounds like it will be a great way for me to adjust my lessons to the proper student levels.