Is beaconhouse school system in top ten list?

There is no single, universally agreed-upon "top ten" list of schools globally. Rankings vary depending on the methodology used (exam results, resources, teacher quality, etc.) and the specific criteria considered. While Beaconhouse School System is a large and well-known international school system, its overall ranking on any particular "top ten" list would depend entirely on the list's criteria and methodology. You won't find a definitive yes or no answer without specifying a particular ranking system.