Singapore Math differs from the way math has been traditionally taught in the U.S. in several ways. Instead of teaching students how to apply formulas, Singapore Math teaches students different ways to solve problems. Rather than using paper and pencil, problems are often solved mentally. Rote memorization is replaced with understanding the “why” behind each concept. Concepts are taught once, not repeated year after year. The focus is on covering a limited number of concepts in depth rather than simply touching on a breadth of concepts. Worksheets have no instructions so that students learn concepts in school instead of at home.