Moment of clearity

When we first started going through finding the domain of a quadratic when it is under a radical i was totally lost. As we practiced it i realized it was the easiest thing we have done all year. I liked it when you gave us a practice packet with room to do the problems on it. I do not like having to do it in my notebook  when you give us a bunch of problems on one page because i tend to mess up the problems and do the same one over.