You're not "turning" you're stopping yourself, by sideslipping your way down the hill.
1. stop sideslipping
2. bomb a bunny hill, get used to and comfortable with speed.
3. stop sideslipping
4. learn to carve bunny hill, edge to edge quick turns, pretend youre a slalom racer (dont be afraid to go fast, speed=control)
5. pump your carves, dig that edge in and carve it. Once you experience/feel yourself do an actual carve you will never want to sideslip your way down a hill again. Chase that carving feeling, and don't ever stop.
6. stop sideslipping
7. wire it on the bunny hill till you get bored with it, then move up to a green dot. repeat process until you are amped and ready to charge a black diamond. get a little aggressive and shred it, and stop sideslipping.