Iman Shumpert should study ...

When Derrick Rose first entered the league, he had no clue how to use ball screens. Bulls fans used to beg his coach to stop using them and just put him in isolation plays. Naturally, he learned that using screens can be a big help by making it far tougher for defenses to cover him and his passing options. He's one of the league's best pick-and-roll men now.