Tell me if this makes sense?

Set a goal each year for Math facts and once the kids hit the goal they can do something else. It seems to me they can only get so fast. It does take time to write down the anwsers. Do they really need to do all the drills again if they have it?

One day I looked at my 3rd grader's math drill page with single digits next to my 1st Grader's page with 10 less problem and felt like school is overdoing it. It just seems like a waste of time if he has got it already. Am I wrong?