Most of the multiples of eleven are really, really easy, and probably just has simple pedagogical value. Multiples of 12 come up a lot because dozens are used

Most of the multiples of eleven are really, really easy, and probably just has simple pedagogical value. Multiples of 12 come up a lot because dozens are used a lot in real-world counting of length and time. Perhaps less in a metric country, but hours and days are still divisible by 12.