when i was in second grade i always liked to do the timed math tests. i always like the competiveness of it and trying my best to improve. it was also a lot of fun to compete with the kids around you and see either who got the most wrong or who finished in the fastest time. i believe that they were able to help us improve our math multiplication a great deal because it was a fun way that kept us interested. and as the years progressed those test would become harder and harder with more questions and a much more varity of questions aswell.