One arm at a time, reach arm out in front of you like you are going to shake someone's hand. Raise arm up ear. When it reaches your ear, turn hand so that your palm is facing out. Keep rotating your arm backwards, pinkie entering the water first. As your arm returns to your side, start your second arm, repeating the same actions.
Many children have a hard time getting their arms all the way out of the water.
Tell them to reach for the sky, try to touch the clouds. A flutter kick is used when doing the back crawl. Children should already be familiar with this kick. It is very essential to teach slowly and work on one part of the stroke at a time. Kick boards are a definite must when teaching this stroke.