How does knowledge acquisition contribute to the process of learning t
o teach? To answer this question, qualitative and quantitative data we
re collected to investigate the development of teacher candidate knowl
edge about classroom management within an elementary teacher education
program. Specifically, concept maps and interviews revealed patterns
of cognitive change over a two-quarter sequence of courses. Analysis o
f concept maps showed turbulent and idiosyncratic change influence by
program experiences, with an apparent decline in cognitive organizatio
n. In interviews candidates deemphasized program influences, focusing
instead on clinical experiences as the impetus of cognitive change. Th
ese findings--the turbulent apparent decline in cognitive structure an
d the primacy of field experiences--are explained in terms of Anderson
's ACT learning theory. Implications for future research in teachers'
conceptual development are discussed.