Photographing people moving can be very challenging. One fun way to practice and experience how movement and shutter interact is to photograph people on swings.
Depending on where you stand, a swinger can be quite complicated to focus on. Shooting straight on requires quick focusing skills, or pre-focusing the camera manually to get the best shot.
Developing movement skills can be useful in all types of shooting situations. Sports, water and weddings all have movement. Animal photography, which doesn’t often give you a second chance also requires you to shoot quickly while reacting to movement.