Tips dunks just like anything else in basketball take practice and if you put the work in to it you will be able to develop an instinct for the basketball and where it is going to go. Teach your players to go hard to the rim and if they can’t dunk the ball back at least get their hands on it and try to tip it back in. Another great rebounding drill that is similar to this drill is 5 Spot Offensive Rebounding Drill.