I never try to make adjustments during a game. Let them play. Practice is for coaching and making adjustments.How do you differ your approach in these two situations:
One girl has been working on a skill and knows the correct approach but at times in games does not execute like she does in practice.
The second girl is playing like she has always played and may or may not know what she is doing wrong
Next question: do you address them during a game? Or wait until practice? Probably depends on quite a few variables...
Just my $.02