Public schools are institutions that provide free education (K-12 education). School budgets are drawn from state, local and federal tax funding and may sometimes include private funds, such as the donations given to a charter school. Public schools include all levels of primary and secondary education and are managed on the level of a school district or a school division. School districts are usually parallel to city and county geographical districts, but sometimes include a larger jurisdiction or an entire region.
The key difference between public schools in the U.S. is the range of ages or grades they serve, and sometimes the teaching methods they use. Elementary or primary schools accept children from kindergarten age to grades five or six, depending on the state or the school district system. Sometimes, only grades two and three are included in primary schools, while higher grades, such as fifth and sixth, are included in elementary schools. Middle schools, junior high or intermediate public schools run classes for children enrolled in six, seventh, eighth or ninth grade. High schools take care of the education of older students from grade nine to grade twelve. K-12 public schools sometimes offer online education.