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"through a painstaking process that includes not just software development but also testing, data gathering, observations of classroom dynamics, interviews with teachers, assessments of children's learning and controlled comparisons. This school year, in 16 classrooms in New York and California, researchers will assess children at the beginning and end of a four-week unit to see whether the apps - and an accompanying set of materials for teachers - make any difference. "

"What works in science and math education? Until recently, there had been few solid answers - just guesses and hunches, marketing hype and extrapolations from small pilot studies. "

"High school students are taking more advanced science and math courses than ever, and graduating with many more science credits that could pave the way to careers in science and technology. Try taking a short quiz and see how well you match up."