As for High Schools Oak Hill Academy and Dematha have produced many, and as for University, UCLA, North Carolina and Duke have produced the most.
UCLA with 66 players. North Carolina has sent 65 players to the NBA.
UNC CHAPEL HILLLLLLL YOU KNOW
UCLA has produced the most NBA players and Duke is a close second. UCLA has 17 players in the NBA and Duke has 15.
I believe it the UNC
The University of Kentucky has the most players that are in the NBA with 20 players. Duke University follows with 18 players in the NBA.