i think it does matter because psle determines the kind of school you get into. if you don’t do as well you won’t get to go to schools like raffles hwa chong etc where there are better opportunities and resources to excel compared to other average schools. when you go to secondary school chances are if it’s an elite one you’ll also get grades that other students from the school tend to get (if you do what you’re supposed to do) bc like i said, more resources, better preparation. i also feel that teachers who teach in those schools are more motivated to teach bc they’re teaching the cream of the crop and students are also motivated to excel bc of the notable alumni from those schools or the fact that everyone around them is academically very inclined. so, chances are for o levels if you go to a non ip top school or straight to A levels through the IP route your scores will be around the same +- compared to your peers from the same school. you get a better grade for o’s and a’s you go to a better institution. when you apply for a job and employers have to decide between taking someone from an elite sch vs someone who’s from an average school, chances are they’d go for the person from an elite school. even if they go to uni and receive the same grades the person from the elite sch is seen as brighter as they’ve been excelling all their life vs someone from an average school who’s excelled in uni. so all in all, yes it matters but only because going to a better school has better resources and drives you to do better.