Grayslake Central High School has been named the 13th most challenging high school in Illinois in recently released rankings from the Washington Post.
The ranking is an improvement from last year when Grayslake Central received a ranking of No. 18 on the prestigious list, which includes fewer than 10 percent of high schools nationally. Grayslake North also made the list ranked as the 34th most challenging high school in the state. In 2013, Grayslake North was 24th on the list.
Nearby, Libertyville High School was ranked 15th on the list.
In Illinois only 65 high schools of the 682 public high schools and 146 non-public high schools in the state were named to the Washington Post’s list.
College Prep School of America in Lombard was ranked as the most challenging high school in Illinois.
The Washington Post list ranks schools through an index formula that uses the following ratio: the number of Advanced Placement, International Baccalaureate and Advanced International Certificate of Education tests given at a school each year, divided by the number of seniors who graduated in May or June of that year.
In releasing the list, the Washington Post also notes the percentage of students who come from families that qualify for lunch subsidies and the percentage of graduates who passed at least one college-level test during their high school career, called equity and excellence.
Source: Glenbard Township High School District 87 press release