Halftime Buzzer Beater situation

[bainsey]

When you're judging whether a try is released before time expires, the NFHS rules say you must judge the release by, in order of priority:
*the light behind the backboard (new rule in 2009-10),
*the horn.

Of course, most school gyms don't have the light, so we have to deal with the horn. If the horn isn't very audible, the table needs to help you with that, either via the whistle that ABC mentioned, or a secondary air horn.

Keep your eyes on the court, and your ears on the horn.