Glenbrook North and South 31st and 32nd Most Challenging IL Schools
The 'Washington Post' figures are based on number of college-level tests given at a school in 2011 divided by the number of graduates that year.
A national ranking confirms what many Glenbrook North and South students already know: both are challenging schools.
But not as challenging as others.
Okay, so how did these rankings come about?
Well the paper applied a simple formula: the number of Advanced Placement, International Baccalaureate or other college-level tests a school gave in 2010 divided by the number of graduating seniors.
It's not the only rankings that came out this month. US News and World Report released its report on the best high schools in the nation earlier this month. An article explaining it is in Huffington Post.