A teammate,  female backup bowler wants to learn to hook the ball/increase turn/tilt.  She currently comes up the back of the ball with a little turn, using a RG Idol Pearl and just purchased a 900 Zen.  Any suggestions on providing instruction, starting with set up and working to follow through.  I haven't an idea where to start but want to help.

Good training tool, thanks for the tip.   She throws fairly straight which might work well on spare shooting.

Yes semi-finger tip, strong start a bit of cupped wrist.  Thought if she held ball at say a four o’clock position it might give a little more Lift if she would follow through the shot.  Has a tendency to short arm and wonder why there is no roll.   

PS  look at thumb pitch also

Drill setup is good, drilled with left handed layout. She need to work on getting around the ball to get side rotation.  A bit too much end over end and her ball speed is high. 

The reality of a back up ball is the fact that you wont get a lot of side roll unless you can roll your wrist under the ball.  In other words....start with the finger on the outside and cut across the bottom at release so the fingers end up on the inside as they exit the holes.  Just about any bowler I have come across that threw a back up ball had at most 30 degrees of axis rotation, but majority were around 20 degrees.  The only other way you may be able to accomplish more side roll is to have her swing her hips out of the way and open her shoulders up to free up the inside part of the ball so her arm can swing freely from out to in.