I grew up in a farming community (350 people) in southwestern Washington State, enjoying all the advantages of being young in the country. After finishing college in 1972 I joined the Peace Corps, eventually working with the African Mathematics Programme--and becoming interested in mathematics education. In graduate school I specialized in research on mathematical cognition and uses of technology in learning/teaching mathematics, and have continued these interests since.

Now I live in Nashville, TN with my two beautiful daughters (well, with one most of the time when she is not at soccer
tournaments and the other when she is home from college). When not hunting I like to drive fast cars.

Research

My recent research focused on students' development of algebra and calculus
ideas in grades 3-16 and in the nature of multiplicative reasoning and its role
in learning sophisticated mathematical ideas. My present research is on teaching
and learning statistical and probabilistic reasoning (click
here for an overview, or you may click
here to go to the project website). These research foci--ideas of algebra, multiplicative reasoning, and statistical and probabilistic reasoning--are highly related. However, it takes awhile to explain it.