Hi I suspect that not one size fits all and most schools have variations on a theme when it comes to mentoring and intervention strategies. I was asked once to ' mentor' a group of Y 11 students .I asked for the evaluation of the impact of the mentoring on the previous year's co hort before I committed to the time .No one could provide any evidence as to how the programme had improved the performance of the students.I am heartened by your references to things like self esteem - in my place the mentoring by staff was only there to attempt to boost grades. Does your school do PASS or something similar ? You cd run this programme post and ante intervention and see what the results show. Sorry this may have been of no help !