A slice is most commonly caused by an out-to-in golf swing path cutting across the ball through the impact zone.
By using two-tees during practice, you can get yourself on the right track to curing your slice. Place one tee behind the ball the other slightly inside it. By striking both tees when hitting the ball, you learn to attack the ball from the inside thus eliminating that left-to-right spin which results in a slice.
With this golf swing tip and lots of practice, you may even get that draw shape you’ve been dreaming of!