On the 26th, 27th, and 28th of February of 1988, a conference was held
on the epistemological foundations of mathematical experience as part of
the activities of NSF Grant No. MDR-8550463, Child Generated Multiplying
and Dividing Algorithms: A Teaching Experiment. I had just completed
work on the book Construction of Arithmetical Meanings and Strategies
with Paul Cobb and Ernst von Glasersfeld and felt that substantial
progress had been made in understanding the early numerical experiences
of the six children who were the subjects of study in that book. While
the book was in preparation, I was also engaged in the teaching
experiment on mUltiplying and dividing algorithms. My focus in this
teaching experiment was on investigating the mathematical experiences of
the involved children and on developing a language through which those
experiences might be expressed. However, prior to immersing myself in
the conceptual analysis of the mathematical experiences of the children,
I felt that it was crucial to critically evaluate the progress that we
felt we had made in our earlier work. It was toward achieving this goal
that I organized the conference. When trying to understand the
mathematical experiences of a child, one can do no better than to
interact with the child in a mathematical context guided by the
intention to specify the child's current knowledge and the progress the
child might make.