One phrase Jason Kidd has repeated over and over as he has prepared to make his coaching debut in the NBA Summer League is the whole experience is like “summer school” for him.

It didn’t take him long to get his first lesson yesterday, as Kidd was nailed with a technical foul for leaving the coaches’ box late in the fourth quarter of the Nets’ 76-67 loss to the Pistons in the first of five games the Nest will play this week.

“It’s a lesson learned,” Kidd said, before adding with a smile, “and I know I can’t go past half court.”

It was the first lesson in what will have to be a steep learning curve for Kidd, who only retired from a brilliant 19-year Hall of Fame playing career a little more than a month ago, and is still understandably adjusting to his new role.

“I’m learning,” Kidd said. “As a coach, you’re going to learn every day from the good and bad. My job, come training camp, is to get settled with the guys we have on the team ... every coach in this league, I think, learns every day from a game. Once you know everything as a coach, you tend to retire and do something else.

He will also understandably lean on his lead assistant, Lawrence Frank, his former coach when he was a Net, as he did throughout yesterday’s game. Frank often was the one holding the clipboard during the coaching staff huddles during timeouts, with Kidd then usually delivering whatever message the coaching staff came up with to his players. On a couple of occasions, Frank himself drew up a play for the players to run. Kidd has said he will draw up his own plays, and attributed not doing it at times yesterday to the fact timeouts in summer league are 30 seconds shorter than during a regular-season NBA game.

Point guard Tyshawn Taylor said the two coaches seemed to split the responsibilities in half.