This document provides information about basketball hand signals used by referees. It begins by explaining that referees use brief hand signals to communicate fouls and violations to the scoring table. It then distinguishes between fouls and violations, with fouls involving illegal contact and violations being minor rule breaks. The document outlines the different types of fouls like pushing, holding, and illegal use of hands. It also lists common violations like traveling, double dribble, and three seconds in the key. Diagrams and descriptions are provided for the proper execution of different hand signals for fouls, violations, and game clock signals. An evaluation section describes a test for students to identify signals.