What does "top 10% of graduating class" really mean?

[hmom5]

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Instead, for these lesser known high schools, standards of scrutiny more rigorous than top tenth percentile, such as top 1% or top 5%

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<p>At these schools today, for top colleges, the kid really needs to be val or sal. At a mid tier ivy–Dartmouth–40% of the ranked are val or sal. When you add in the hooked, that’s most from even solid high schools.</p>