Does this happen at your DC's 6th form?
I'm concerned as Dd2 says everyone peer assesses "kindly" ie gives higher grades than it would get if it were marked by a teacher. Teacher has hardly marked anything it seems just offloads to students about her mother suffering from dementia and the thieving carer, and how much marking she has for other years
I have read the literature etc on peer assessment and it's benefits but in year 13 I really feel the students would benefit more from an accurate and professional grading from the teacher.