Feet should be shoulders width apart, right or left foot back half a foot distance from the other,squat down, drop your hand just underneath your nose on the ground fingers spreadout, keep butt down. head up, eyes looking forward. practice it. . stay low drive with the hips. short steps.
I teach my boys that they need to start out like a sumo-wrestler. Get your feet set, one at a time, a little wider than shoulder width apart. Let your down-hand swing between your knees then back in front of you setting it down in front of you. Your head and butt should be about even with each other. At this time, drop your butt until it's just a bit above your knees on an even plane. Spread your shoulders, flex your fingers to make sure you have good forward placement, then look up (head up.) Have someone you know push moderately on your shoulders back to see if you give ground. If you do, then place more weight forward. Same thing from the back. If you rock forward, shift weight backward and drop your butt a little. Same thing side to side. Once all four areas have been checked and you have a solid stance with little movement, work on holding that stance for about 20 seconds at a time. (if your team or coach are taking longer than this to snap the ball good luck).
Coach Nick (Colorado)
here is a link to a video on youtube that we used to help teach our lineman how to do the 3 point stance with proper technique and balance. we are teaching our lineman to angle block so the jab step is key to our offensive lines success.