Boulder Colorado, the 11th most populated city in the United States, is also internationally known for its great public school education. The main local school district is the Boulder Valley School District. The school district dedicates itself to excellence and equity. Within the school district fall the preschool, elementary school, middle and high school education system. The preschool education is one of the most exceptional for children of ages 3 -4 and provides everything from social and emotional learning to physical and cognitive development. There is a fee for tuition for preschool education for four half days a week and it covers all expenses for that period of time. Within the Boulder Valley School District are dozens of elementary school in order to give the most convenience to people living all across the city and the city suburbs. Each one is dedicated to furthering and fostering the great educational qualities that were begun in the preschool system. Middle schools in Boulder school district are often put together with the elementary schools (K-8). This enables the children to grow up together and form life long bonds. The 12 high schools in Boulder school district all serve to prepare children for higher education and work to keep them both mentally and physically active and in shape.