I really like the way Saxon math teaches the facts. They teach “strategies” instead of using fingers/manipulatives (although manipulatives are used in intros. and as needed). There are doubles, which the children simply memorize easily. There are “plus one” facts (like counting to the next number), “plus zero” facts, which, again, are easy to see after using manipulatives for a little bit). There are “doubles plus one” facts, “adding two” facts, etc. You teach a STRATEGY for remembering and then the kids practice DAILY in a variety of ways–paper practice, raps, string “wrap-ups”, etc., etc. It’s the best way I’ve seen so far, as opposed to the old methods we used to teach!
Taken from MathCats.com
Teaching Addition– Saxxon Math Methods