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					Originally Posted by Snaqwells
					
				 Just explain that it's a violation for the ball to go up through the bottom, and once that happens the ball is dead and a goal cannot be scored. | 
	
 That's the key.  The violation makes the ball dead.  Once that happens, one no longer has a 
LIVE ball entering the basket from above.  Rather one has a dead ball doing that.
 
6-7-9 The ball becomes dead, or remains dead, when:
. . .  A violation, as in 9-2 through 13, occurs (see exception d below). 
 
9-4  A player shall not travel with the ball, as in 4-44, intentionally kick it, as in 4-29, strike it with the fist or 
cause it to enter and pass through the basket from below. 
 PENALTY:
The ball is dead when the violation occurs and is awarded to the opponents for a throw-in from the designated out-of-bounds spot nearest the violation. 
 
Basketball Rules Fundamentals
3.  A goal is made when a live ball enters the basket from above and remains in or passes through unless canceled by a throw-in violation or a player-control foul. 
 
16.  The official's whistle seldom causes the ball to become dead (it is already dead).