Rasheed Wallace is in for a world of annoyance at his new job as a high school hoops coach ... this according to his fellow ex-NBAer, Kenyon Martin ... who says kids don't listen to a damn thing nowadays.
Sheed was officially announced as the next head coach at Jordan HS in Durham, NC on Friday ... and when we got K-Mart at LAX, he had some slightly bad news for Wallace.
"It's gonna be tough, but I wish him all the best," Martin tells us.
Why exactly??? Kenyon -- whose son is a prodigy at Sierra Canyon in California -- has been around youngins since his boy has been playing ... and says they all have one thing in common.
Martin praises Wallace for going back to the prep level to share his vast knowledge of the game ... and says even though it's gonna be tough, he's got full confidence in Sheed succeeding.