Start standing with your legs hip-width apart, with hips and knees slightly bent.
Shift your weight onto left leg and pick your right foot up from the ground.
Bend your left (standing) knee to lower your hips a few inches, then push explosively off your standing left foot to jump to the right side landing on your right leg.
Bring your left leg towards your right ankle without it touching the floor.Repeat to the other side; you should jump as far as possible so that when you land, you immediately take off again to the other side.
Repeat for required amount of repetitions for each side.