One of the Best Drills to Fix Your Slice
Your right arm has an important role in your swing. But most players don't understand how their right arm should move during the swing because they started playing with both hands on the club.
From what I have seen, tennis players do well in golf. I think that the reason is because they understand how to swing a club with their right arm.
If you are just starting golf, it's a good idea to swing with your right arm only. It teaches you lots of things.
This drill is also good for average players as well. This is how you can do it. Use 9 iron for this drill
1) Use a narrower stance than normal
2) Grip the club with your right hand only. Put your left hand on your right upper arm
3) Take a few practice swings
When you do this focus on the face angle and the weight of your clubhead.
You don't have to take a full swing. Try a half swing. After you get used to it, try to hit some balls with your right hand only.
When you hit balls, tee it up. You don't have to hit it far, but you should try to hit it in the center of your clubface. Focus on your clubface and try to rotate your face through impact by turning your right hand to the left.