Aubee wanted me to explain the angles of incidence and reflection. After I showed her the relation of the normal line to the reflecting surface, I showed her how the two angles were equal. Once she understood reflection on plain mirrors, I explained how reflections change in convex and concave mirrors.
I then introduced Aubee to refraction and showed how light bends toward or away from the normal line when it changes from one medium to another. I discussed light in prisms and lenses and how the focal point changes when the lenses are convex or concave. There was no assignment.