Rather, it covers geometric optics for first year students, which it will further help or confuse, although I hope it is the former. The part of geometric optics that often poses the most difficulty, especially in finding the correct answer to homework or exam problems, is the thorny issue of sign conventions in lenses and mirrors. Homework helps reinforce classroom learning, while developing good study habits and life skills. Students typically retain information provided by teachers in class and must apply that information in order to truly learn it. Abby Freireich and Brian Platzer, co-founders of Teachers Who Tutor NYC, explained: “At,