Have the entire team line up on the baseline and hold hands. The goal of this drill is to move together to the other baseline and back. The drill is timed and the team must complete its trip up and down the court in as close to 24 seconds as possible. In order to do this successfully, the team must be able to communicate effectively so they are walking at the same pace. As the coach, you should be watching for any conflicts between teammates, especially if these are recurring issues between those players. It is much better to deal with chemistry issues like this during a practice drill instead of in the middle of an important game.
Ball Sharing Drill
Split your team into smaller groups of five to six players. Start off by handing one player on each team a basketball. Every player must touch the ball once during the drill. Two players may not touch the ball at the same time, so it must be passed to the next player. The person passing the ball must say the name of the next player to get the ball. This drill is timed, with the clock starting as soon as the first player calls out a teammate's name. The timer stops when the last player gets the ball. This drill encourages the habit of passing and involving every teammate in the play.
The blindfold drill teaches players to communicate clearly and efficiently. Divide the players into teams of two, giving each team a blindfold. Line up the teams along the sidelines and have one player on each team wear the blindfold. Have the non-blindfolded player on each team set a pylon somewhere on the court in front of them. Make sure it is placed far enough out to provide a challenge. The non-blindfolded player must verbally direct his partner to the location of the pylon. To make the drill more difficult, place obstacles in the way of the blindfolded player.