Effectiveness and Issues of ESMATE (Project of Making New Mathematics Textbooks for Primary and Secondary Schools) : Contextualization of the Japanese Teaching Style Materials to Current Learning Situation in El Salvador

The low performance in mathematic skills is common in El Salvador, several results in several assessments and evaluations make this ? agrant. Since 2016 in El Salvador a curriculum reform has been developed including new textbooks, for whole grades of primary and secondary school with the technical support of Japan. The national implementation has been held in 2018 and 2019 by proposing a curricular development strategy with the use of textbook. In order to measure the e? ectiveness of textbook and national strategy, an impact evaluation was carried out in 2018, ? rst results showed the improvement of the mathematic performance of Salvadoran students and teachers' practices.