Since the middle 1980s there has been great ferment in the US over the need to reform education in science, mathematics and technology. Reports such as “A Nation at Risk” and international comparisons of achievement in mathematics and science gave impetus to efforts to develop new materials and improve the education of both in‐service and pre‐service teachers so that they can better educate the students who will become our nation's scientists, mathematicians, engineers, technicians, workers and voting citizens.

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