Volleyball is a notable sport in the United States, especially at the college and university levels. Unlike most Olympic sports which are sponsored widely at the collegiate level for both sexes, the women's college volleyball teams are more common than men's college volleyball teams. In the 2011–12 school year, over 300 schools in NCAA Division I alone (the highest of three NCAA tiers) sponsored women's volleyball at the varsity level, while fewer than 100 schools in all three NCAA divisions combined sponsored varsity men's volleyball, with only 23 of them in Division I. Men's volleyball has experienced explosive growth at the non-scholarship NCAA Division III level in the 21st century, with a national championship established in 2012. As of the 2021 season (2020–21 school year), 107 schools sponsor the sport at that level.