I often get asked by coaches and parents "what should I look for?"
Below are five simple parts of the action to look for whilst the spinner is bowling.
It is not possible to look at all five at the same time so my encouragement is to work from the bottom up or the top down during a bowling session.
Make a note of any variances from the five and then discuss with the spinner.
Align shoulders & hips toward target
Lead with front arm toward target. Pull down.
Bowl "up and over" with shoulders
Pivot- rotate shoulders 180 degrees
Complete action with bowling shoulder facing target, with bowling hand to left hip and front arm "out the back'.