1. Starting Position
Extend your right leg directly out to the side, with your toe on the floor.
Drop your left hand to the floor, directly under your shoulder, leaving your arm straight. This will take your torso to the side.
Keep your shoulder open by dropping your shoulder blades down your back and rotating your arm so that your inner elbow crease rotates outward.
For now, place your right hand on your hip.
2. Extend Your Pose
Lengthen your right leg away from you as you lift it to hip height.
Your supporting thigh should be as close to vertical as you can get it.
At this level, it is important to make sure that you are truly fulfilling the moves that you engage in. Take a moment to make whatever adjustments you need to set your alignment. Go for a long, straight line from your right ear to your right toe so that your hips and shoulders are stacked vertically and your chest is open with a good counter stretch moving between your support hand and the elbow of the top arm.
3. Kick Front
Do this move on a two part inhale. Inhale to swing the leg front, add more air to pulse kick.
Make your movement smooth and controlled. The goal is to be able to move the leg in the hip socket without moving the rest of the body.
4. Kick Back
This is a smooth exhale. Only reach as far back as you can go without losing your alignment. You may find this to be a good hip opener.
Repeat the exercise 6 to 8 times on each side.
You will find a detailed before and after comparison of this exercise in the article, Kneeling Side Kick, Form and Oppositional Stretch