Of the 21 high schools in the Gwinnett County School District, 10 are included in U.S. News and World Report's rankings of the nation's best public schools.

The annual rankings measure schools in four major categories: student-teacher ratio, college readiness, math proficiency and English proficiency.

Gwinnett School of Mathematics, Science and Technology is Gwinnett County's top-ranked school (ranked No. 1 in the state, No. 31 in the nation).

North Gwinnett High School (ranked No. 13 in the state) and Brookwood High School (ranked No. 23 in the state) are the second- and third-best high schools in Gwinnett County, respectively.

The district as a whole is down from last year with no school cracking the top 30 nationally.

Steve Flynt, associate superintendent for School Improvement and Operations, about this year's list:

"We are excited that Gwinnett high schools continue to be recognized as leaders in the state and in the nation. We know that making this year's "Best Schools" list will be a point of pride for these schools and their students and staff. This is further evidence of the work they are doing to exceed expectations when it comes to serving students and preparing them for college-level coursework."