These two competitive rebounding drills drills were posted by Winning Hoops.
You can see their You Tube channel at this link: Winning Hoops You Tube Channel
The videos feature Kim Barnes Arico, head women’s basketball coach at the University of Michigan, at the 2014 Basketball Coaches Association of Michigan Coaches Clinic in Lansing, Michigan.
Rebounding and Finishing Drill
Rebounding Toughness Drill
This is a 2-on-2 drill. Split your players into two teams and put 4 minutes on the clock. Each group goes for 45 seconds at a time. The ball is dead if it hits the ground. The losing team runs sprints. You will want to change the rules to fit your needs.