[BillyMac]

Originally Posted by BoomerSooner

... use both hands when signaling the number ... Has something changed with the mechanics and I missed it? ... Has anything changed on the mechanics?

2017-18 NFHS Basketball Comments on the Rules

Officials to use two hands when reporting fouls (2-9-1): Officials will now use two hands to indicate to the scorer the number of the offender. The right hand of the official will give the tens and the left hand of the official will give the ones. If the number is 32 the right hand would show the scorer the three and left hand would show the scorer the two while verbalizing 32. Both hands of the official are shown to the scorer at the same time.

Two-Hand Foul Reporting (Rule 2-9-1 Signals)
•The Official will move to the designated reporting area on the floor.
•Make sure that you have the attention of the scorer prior to giving the numbers.
•Indicate the color of the jersey for the player who fouled.
•The Official shall report fouls to the scorer by using two hands to display the jersey number of the person who committed the foul.
•The official’s right hand will indicate the first digit of the number or the tens and the left hand will indicate the second digit of the number or the ones.
•The official shall extend the arms shoulder high towards the table to display the numbers.
•The digits of the number should be displayed at the same time.
•When reporting, the official shall verbalize the number as twenty-four not two-four.
•The scorer will view the number in a left-to-right sequence.
•Indicate the type of foul using the proper signal.
•If one, two or three free throws are to be attempted, indicate the number of free throws by using one hand.
•If the team is in the bonus for the seventh, eight of ninth foul, indicate the bonus situation raising both hands and display a raised index finger on each hand.
•If the foul is a team control foul, after the official signals the specific type of foul, the official will turn and signal such … indicating no free throws will be attempted.
•After reporting and if no free throws are to be attempted, the official will turn from the table and indicate the throw-in spot to resume play.

Reporting area, verbalizing the call, and signalling the type of foul hasn't changed.