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Arciaga, Violeta, Fe De Guzman, Ester B. Ogena, and Vivien M. Talisayon. TIMSS-Based Teaching Strategies in Science and Mathematics. Quezon City: Department of Science and Technology-Science Education Institute and National Institute for Science and Mathematics Education Development, 2000.

Arciaga, Violeta, et al. TIMSS-Based Teaching Strategies in Science and Mathematics. Department of Science and Technology-Science Education Institute and National Institute for Science and Mathematics Education Development, 2000.