Argues for an approach to conceptual-change instruction that places students' science conceptions and their ability to reflect on those conceptions at the center of science instruction. Focuses on the effect of using status concepts. Contains 24 references. (DDR)

Describes how Mexican-American language-minority students construct biology concept meanings based on extant linguistic skills. Provides an instructional activity that engages students in constructing meanings through mediational means. Contains 35 references. (DDR)