When I went for PT for my knee, the therapist stayed with me for the first few sessions to make sure I was doing the exercises correctly. Then it changed so I was on my own, but everyone was all in one room so he could see me while he worked with another patient on the table, and could comment if I did something wrong.

Back in '93-'94 when I went for my ankle, the first PT I went to didn't help much. After a while my doctor said I wasn't making enough progress so he told me to go to a different PT, who was much better. I honestly don't remember details about how much supervision I had with each of them. But I did learn not to waste time with a PT that doesn't seem to be helping. Especially since insurance is much more limited for PT now than it was back then.