A way for ABC to fulfill its FCC-mandated obligation to show something more than crudely-animated superheroes, toy and cereal ads, and marketing tie-ins (e.g. cartoon series with The Jackson Five, The Osmonds, and Rick Springfield; in ABC's&defense, the earlier Bullwinkle and George of the Jungle were classic. But I digress, no?) on Saturday mornings. Multiplication Rock was first, teaching you your "times tables" with song; later years added grammar and civics.