DD who has just gone up a group and this was about her third lesson. I was talking to a friend when I noticed dd swimming up the pool on her own and the rest of the group where been teached at the end. Then by the time dd came back the rest of the group had started doing the same and she had to swim again with the group. I watched this happen twice more in the lesson. The teach told my dd to go, she watched for a very short time then turned her attention to the rest of the group. DD got back and the rest of the group would be starting to swim and dd would swim with the group.
Ask dd if teacher told her why she had to swim on her own. She didn't know and didn't care.