I was having a conversation with some friends abt hw and Everyday Math the other day. At one point, I blurted, "forgetting how to do something doesn't mean that you don't understand/know how to do it". We just need a quick flip of a book/ or a reminder (eg. a formula) to ring a bell.
While I understand that Math is one subject which repetition is strongly encouraged, sometimes repetition just slows down the whole process (of learning) JMO.