Here is a range of questions that should glean info from the kids.
Do you like pshe? Straight away that will tell you if they know what it is. What are you learning about in pshe? This will let you know if the unit/sessions stand out to them. And if staff are teaching what you think they are. Do you think you do a lot of pshe? This will tell you how regularly they are taught it. How could your teacher make it even better for you? Should unearth things that Arnt happening. And the children's interests.
Simple but effective. I'll find my questionnaire and write the other questions I ask.