Couple things I want to clarify...

[Back In The Saddle]

First situation:

NFHS 4-3-3-a: Alternating-possession control is established and the initial direction of the possession arrow is set toward the opponent’s basket when:
. . .
ART. 3 . . . The ball is placed at the disposal of the thrower after:
a. A violation during or following the jump before a player secures control.

An OOB violation, where one jumper clearly touched it last, results in a throw-in for his opponent's team and the arrow being set toward his basket.

Interestingly, I don't see an analogue to this rule in the NCAA book, but A.R. 130 would clearly apply:

A.R. 130. During the opening jump ball, A1 illegally catches the tossed ball. The referee blows the whistle and awards the ball to B1 at a designated spot nearest to where the violation occurred. How is the alternating possession arrow established?
RULING: The first legal possession is by B1 on the throw-in. When the official hands the ball to the player from Team B, the alternating-possession arrow shall be set for Team A.

Second situation:

NFHS 7-1-2: The ball is out of bounds:
a. When it touches or is touched by:
. . .
3. The supports or back of the backboard.
b. When it passes over a rectangular backboard.

NCAA 7-1: Art. 2. The ball shall be out of bounds when it touches a player who is out of bounds; any other person, the floor, or any object on or outside a boundary; the supports or back of the backboard; or the ceiling, overhead equipment or supports.
Art. 3. The ball shall be out of bounds when any part of the ball passes over the backboard from any direction.

Correct on both counts. Keep up the good work.

I was questioned Saturday about a free throw that bounced up off the rim, touched the top of the backboard (without touching the supports) and then back down through the basket. I tell people that the front, sides, top, and bottom are in; perhaps it would be simpler if I told them, "Only the back of the backboard is out."

Originally Posted by Back In The Saddle

I tell people that the front, sides, top, and bottom are in; perhaps it would be simpler if I told them, "Only the back of the backboard is out."

I generally tell them that there are 6 sides to the backboard but only 1 is OOB.
As they attempt to figure it out, the look on 85% their faces is PRICELESS!

[JugglingReferee]

Originally Posted by Ch1town

I generally tell them that there are 6 sides to the backboard but only 1 is OOB.
As they attempt to figure it out, the look on 85% their faces is PRICELESS!

Consider it stolen!

[referee99]

... that the back bottom edge of the board (shared by the bottom plane and the back plane) is 'the back of the board', yet I would never call it OOB (as long as the pass bounced downwards)?

[JugglingReferee]

Originally Posted by referee99

... that the back bottom edge of the board (shared by the bottom plane and the back plane) is 'the back of the board', yet I would never call it OOB (as long as the pass bounced downwards)?

I don't believe that the edge belongs to both the bottom plane and back plan. I think the edge is by definition, infinitesimally thin.

[Back In The Saddle]

Which means that the way the ball rebounds after hitting the edge results not from hitting the edge, but from hitting one of the planes that intersect at the edge.