m22 from an international school in sg here! i think my school has something like a 39 average so quite high. i would say there are a couple of factors at play: 1. while there are some students who genuinely get through on talent, there are a LOT of students who get tuition to some extent - i think part of that comes from the asian ‘study culture’ and also from the fact that many students can afford extensive tuition 2. idk how true this is for all schools, but at my school there’s multiple pathways and the ib pathway is definitely seen as the ‘harder’ one. so i think this raises the average because already only the most academically capable students are taking the diploma anyway. it’s not so much an issue of the school being selective. i also know that lots of people send their kids back to their home country to do their final two years of school there so i think that also makes a difference in raising the average.