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.