An elementary school is the main point of delivery of primary education in the United States, for children between the ages of 6–11 and coming between pre-kindergarten and secondary education.In 2001, there were 92,858 elementary schools (68,173 public, 24,685 private) in the United States, a figure which includes all schools that teach students from First Grade through Eighth Grade. According to the National Center for Education Statistics, in the fall of 2017 almost 35.6 million students attended public primary schools. It is usually from kindergarten through fifth grade.Primary education tends to focus on basic academic learning and socialization skills, introducing children to the broad range of knowledge, skill and behavioral adjustment they need to succeed in life – and, particularly, in secondary school. In general, a student learns basic arithmetic and sometimes rudimentary algebra in mathematics, English proficiency (such as basic grammar, spelling, and vocabulary), and fundamentals of other subjects. Learning standards are identified for all areas of a curriculum by individual states, including those for mathematics, social studies, science, physical development, the fine arts, and reading.While the concept of state learning standards has been around for some time, the No Child Left Behind Act has mandated that standards exist at the state level.