My enduring intellectual interests were all formed in the 4 years of graduate education with Gordon Bower. I basically imprinted on the things he was interested in during the period 1968 to 1972. This included an interest in mathematical psychology, artificial intelligence, learning and memory, and applications of psychology to improving classroom performance. Whereas Gordon’s interests have ranged far and wide over the decades, I have remained stuck on these topics. This chapter describes current work in my laboratory bringing these various threads together. I am going to describe a formal information-processing model of how children learn to solve linear equations and test predictions of this model for activation patterns in five brain regions.