This article explores, through an analysis of 5 students' experiences in an
integrated science and social studies unit on Antarctica, how the students
acquired new knowledge. It looks at how new knowledge was constructed from
prior knowledge and how prior knowledge was shaped by new knowledge. This
is done through examples of 3 types of learning. The first example describe
s the way students represented and integrated new experiences in working me
mory using a model of the learning process designed to predict what student
s will learn and remember from their classroom experiences. The second exam
ple develops this model by exploring how the acquisition of specific inform
ation shaped students' understanding of larger curriculum topics. In the th
ird example, the role of inference and implicit knowledge is illustrated th
rough an analysis of how students acquired knowledge in the absence of rele
vant resources or experiences. These examples are also used to explain how
different students learned different things from the same classroom activit
ies and how different classroom activities created different learning proce
sses. Implications for the design of more effective classroom tasks and act
ivities are described.