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IN ADDITION TO MEASURING TRENDS in mathematics and science achievement, ºìÐÓÊÓÆµ 1999 collected extensive information about the teaching and learning of mathematics and science around the world. Through a series of questionnaires, ºìÐÓÊÓÆµ gathered information about curriculum, instructional practices, policies, and student background and attitudes. Many of the questions also were asked in 1995, provididing trends for countries that participated in both assessments.
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