Flex - Continuous Positionless Motion Offense

Flex should be taught at an early age of learning the game of basketball. It incorporates all the levels of understanding SPAT - Spacing, Positioning, Angles, and Timing. It has evolved into the back and forth pick and roll.  However, that style offense with ball screening and the intricate details of learning how to navigate both sides of the ball, should not be introduced until maybe the middle school level, depending on the skill level and fundamentals that student athletes possess. Proper screening and setup into moving off a screen, it teaches how to score at the basket and to learn the midrange game of shooting, when to back cut, and develop the concept of read and react basketball that can progress into other offenses and style of play without having set back up - the phrase should be "shape up" when options present themselves to attack the defense another way. 
-- Cope