This is one of our favorite drills our kids really enjoy this and we feel it very beneficial for our team rebounding and aggressiveness.
We have 4 lines-2 under the basket and one line on each sideline free throw line extended. The 2 players under the basket step out to the free throw line facing the coach or manager who is the shooter. On the shot, they must block-out and get the rebound. The player getting the rebound throws the outlet pass to one of the players on the sideline running the break. The player not getting the rebound must get back and defend 2 on 1.
In our drills we have no out-of-bounds. This helps us be more aggressive.
Make sure that the players switch lines.
Your more aggressive players only want to rebound and your timid players only want to run the break. Make them switch lines.
This basketball drill is licensed under a Creative Commons License. This drill is from Pål Degerstrøm at www.degerstrom.com/basketball.