There are four core subjects at First, Second and Third Grades which are; Turkish, Math, Hayat Bilgisi (literally meaning "Life Knowledge") and Foreign Language. At Fourth Grade, "Hayat Bilgisi" is replaced by Science and Social Studies. The foreign language taught at schools changes from school to school. There are five core subjects at sixth and seventh grades; Turkish, maths, science, social studies and foreign language. At eighth grade, social studies is replaced by history and citizenship.