A major characteristic of American schools is the high priority given to sports, clubs and activities by the community, the parents, the schools and the students themselves. Extracurricular activities are educational activities not falling within the scope of the regular curriculum but under the supervision of the school. These activities can extend to large amounts of time outside the normal school day; home-schooled students, however, are not normally allowed to participate. Student participation in sports programs, drill teams, bands, and spirit groups can amount to hours of practices and performances. Most states have organizations that develop rules for competition between groups. These organizations are usually forced to implement time limits on hours practiced as a prerequisite for participation. Many schools also have non-varsity sports teams; however, these are usually afforded less resources and attention.

Sports programs and their related games, especially football and/or basketball, are major events for American students and for larger schools can be a major source of funds for school districts.
High school athletic competitions often generate intense interest in the community.

In addition to sports, numerous non-athletic extracurricular activities are available in American schools, both public and private. Activities include Quizbowl, musical groups, marching bands, student government, school newspapers, science fairs, debate teams, and clubs focused on an academic area (such as the Spanish Club) or community service interests (such as Key Club).