what school do you go to? Is it a top private/grammar?
By AAAA/BB I meant "Two As definitely plus anything from two As to two Bs" so it's not that high really. It's Karachi Grammar School (Pakistan) but not "Grammar" like in England because the "Grammar/Comprehensive/Private" thing isn't really present in Pakistan.
It's quite academically elitist if you're coming in at A Level but there are also many people who got in in primary classes so they bring the average down to AABB.