I've spent a lot of time trying to correct this thing when I would just shove my hips to the side to edge by skis then I dumped by body inside. To fix this, I spent a lot of time working on edging from the feet up. Caveat: It’s pretty common for people to do this and move purely laterally. Make sure your instructions and demos emphasize forward and diagonal movement. Also, keep an eye out and fix it quickly. Start statically by rolling the uphill instep towards the little toe. You might have to point out where the instep is. You can enhance this by moving to the corner of the boot. I try this out using a garland moving from the corner one boot to the other. You will likely see students try to twist the ski instead of tipping it. Remind students that we want to tip the ski before we twist it. Then I bring up the focus to the thigh. Moving the thigh forward and inside the turn will draw the hips and upper body inside. Thanks to the Elk guy who taught me this and helped me m...