INDEPENDENCE — This summer in Las Vegas, the Cavaliers’ Tyronn Lue put on his basketball shorts and dove into the teaching business.

Seeing Lue clad in such attire while working with rookie point guard Collin Sexton was a strange sight for some in the organization, even though Lue, 41, is only 10 years removed from his final season in the NBA.

Lue believes he is the best young coach in the league, a distinction most would give to the Boston Celtics’ Brad Stevens, who turns 42 next month. When practice opens Tuesday, Lue will get his chance to prove that.

With LeBron James leaving the Cavs for the Los Angeles Lakers in July, this season will be the true measure of Lue as a coach. He’s already known for his ATOs (after timeout plays), his playoff game plans, the notebooks he filled during the three seasons he spent assisting Doc Rivers.

It will take more than scribbles in a notebook to lead the Cavs out of the post-LeBron wilderness.

Oddsshark.com has the Cavs’ over-under victory total at 30.5, after they won 50 games last season. Most around the league don’t see the Cavs as a playoff team, even though that remains owner Dan Gilbert’s goal.

Who will make up for the loss of James’ 27.5 points, 8.6 rebounds and 9.1 assists? Who will take over the game in the final two minutes? With aging veterans and inexperienced youngsters, how will Lue put together a lineup that’s only certainty at the moment is five-time All-Star Kevin Love?

But when it was suggested to Lue at Monday’s media day at Cleveland Clinic Courts that the spotlight was gone, Lue responded, “I’m still here.”

A smidge of Lue’s confidence in himself slipped out.

Already a championship coach, Lue realizes his challenge now is to get the Cavs to believe they can win every time they step on the court.

“With LeBron leaving, that’s a tough task,” he acknowledged.

Kyle Korver, 37, knows how tough. Asked to assess where the Cavs realistically stand, Korver was more realistic than expected.

“We’re going to evolve. We’re going to play a different style of basketball. If we don’t, we probably won’t be that good,” Korver said. “It’s a great opportunity for all of us — from the top to the bottom of this organization — to create a new path, to find a new style, to fit in.

“Anytime when I was growing up and I would move, there would always be something that I didn’t really like about myself before and I’d be like, ‘You know what? I’m going to change this thing about me now.’ This is kind of like that. We didn’t move, but we kinda did. If there’s something that maybe we didn’t like about how we operated or who we were, we’ve got a great opportunity to kind of reset that and change it.

"I’m not saying that we have bad things, but there’s a great opportunity to kind of reset a lot of things here and that’s exciting.”

Playing for his fifth team, Korver praised Lue for his “great basketball mind” and called him a coach who “feels and sees the game really well” while explaining what the Cavs must do without James.

“With the way our team was set up, things were really simple in what we ran and what we operated. It was really about giving LeBron freedom to be amazing,” Korver said.

“I think we’re going to see a new side of Ty. He’s going to have to be more vocal — not that he wasn’t vocal before — but we need that voice that was kind of leading in those moments. LeBron had a really loud voice. We all have a new challenge ahead of us. Life is going to be a lot different going forward as far as basketball goes, and Ty’s probably included in that.”

Lue longed for the day he could build his own team, when he could work with young players, and that day has arrived.

“To quote Doc Rivers, ‘Never assume they know,’” Lue said. “We’ve got to start from the bottom and build up. Our coaching staff has been doing it all summer.”

Love said there may be times where Lue will have to stop practice and go over something again to emphasize what he wants.

“We’ve got to teach for the whole season,” Lue said. “I’ll tell our team tonight, it’s not about wins and losses, it’s about wins and lessons.”

By the end of the season, we will know what kind of teacher Lue is, and in turn what kind of coach. We will know if his belief in himself will be validated.

There is no doubt the swagger from his playing days is still there. Asked Monday who is the East favorite after James led them to four consecutive conference titles, Lue said, “We haven’t lost yet, have we?”