Reports on a pilot study that examined use by sixth-grade students in Costa Rica of a mathematical microworld written in LOGO. The investigation had three phases: (1) open exploration of the microworld; (2) group discussion and sharing of hypotheses; and (3) guided discovery and problem solving. (Contains 11 references.) (SLW)

Describes the development of a science-based computer simulation for sixth graders on global warming that integrated research, writing, speaking, science lab, and computer skills. Highlights include teacher/librarian collaboration; problem-based learning; building knowledge; design and planning; creating Web pages; gathering, organizing, and…