Adolescents’ Problem Solving Ability in Mathematics and Medium of Instruction

Background: Today’s world considers English as a global language because there has never been a language so widely spread or spoken by so many people as English [1]. The main idea of English medium instruction (EMI) is to combine the conventional instruction of content-area subjects with foreign language-learning. Using a foreign language is certainly a major obstacle in problem solving in mathematics since it involves abstract thinking and mastery of mathematical terminology which make a high demand on language proficiency.