These exercises work the shoulder in three major planes of the shoulder. It is important to keep the elbow straight and shoulder blade down and back. 

Equipment: theraband or a resistance band.
Start: You are going to step on one end of the theraband.
Flexion: With your thumb pointing up and shoulder blade down and back, lift your straight arm up in front to 90 degrees. 
Abduction: Again, the thumb will lead and lift your straight arm out to the side to 90 degrees. 
Scaption: You will bring your arm up at a diagonal (in between flexion and abduction) with your thumbs up.
Perform each exercise for 2-3 sets of 10-15 repetitions.