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Yang, Der-Ching; Sianturi, Iwan Andi – EURASIA Journal of Mathematics, Science & Technology Education, 2017
Organization for Economic Co-operation and Development (OECD) (2016) released the results of Programme for International Student Assessment (PISA) 2015 and reported that the students' performance in mathematics of Singapore and Indonesia had significant differences. There is a strong relationship between textbooks used and mathematics performance…
Descriptors: Foreign Countries, Textbooks, Textbook Content, Trigonometry