Editing Shot clock (section)

===US high schools rules===
The [[National Federation of State High School Associations]] (NFHS), which sets rules for high school basketball in the U.S., does not mandate the use of a shot clock, instead leaving the choice to use a clock and its duration up to each individual state association. In concert with this, the "stall ball" strategy can be used in a state or league, but depending on the organization, itself comes with restrictions on its use by the game officials, with overuse of it often being whistled as a foul or an unsportsmanlike act. Others may allow stalling completely, at the risk of fan disinterest.

As the cost of a shot clock system can be cost-prohibitive, its use in high schools has been debated on that consideration and not the flow of the game. While previous proposals for a national shot clock had been denied by the NFHS as recently as 2011,<ref name=usat>{{cite news |url= https://www.usatoday.com/sports/preps/basketball/2011-05-15-high-school-shot-clock_N.htm |title=Focus on high school shot clock heats up as states make move – USATODAY.com |first= Jim |last=Halley |work=[[USA Today]] |date=May 5, 2011|issn=0734-7456 |access-date=December 31, 2011}}</ref> in the spring of 2021 the NFHS agreed to allow its member associations the option of a shot clock, with a mandatory 35-second duration, starting in 2022–23.<ref>{{cite press release|url=https://www.nfhs.org/articles/shot-clock-allowed-by-state-adoption-for-high-school-basketball-in-2022-23/ |title=Shot Clock Allowed By State Adoption for High School Basketball in 2022-23 |publisher= National Federation of State High School Associations |date=May 13, 2021 |access-date=August 12, 2021}}</ref>

As of August 2021, 11 states either require a shot clock in high school competition or will begin using one starting in 2022–23: California, Georgia, Iowa, Maryland, Massachusetts, Nebraska (Class A only, expanded to Class B in 2023-24 and to all classes in 2024-25), New York, North Dakota, Rhode Island, South Dakota, and Washington.<ref name=usat/><ref>{{cite web|url=https://www.press-citizen.com/story/sports/high-school/2021/08/10/shot-clock-iowa-high-school-basketball-ihsaa-ighsau-statement-2022-23/5550888001|title=IHSAA, IGHSAU release joint statement on shot clock coming to Iowa high school basketball|last=Southard|first=Dargan|work=[[Iowa City Press-Citizen]]|date=August 10, 2021|accessdate=2021-08-12}}</ref> Before 2022–23, the District of Columbia used a 30-second shot clock for public school [[District of Columbia Interscholastic Athletic Association|(DCIAA)]] competition, charter school competition (as of 2018–19), and for the [[District of Columbia State Athletic Association|DCSAA]] State Tournament, where public, private, and charter schools compete for the championship of the District of Columbia.