Okaloosa County maintained the "A" grade it's held since 2014, while Escambia County earned a "C" for the second year in a row.
Five of the six schools who received a "D" past year improved one letter grade.
"We worked so hard". Elementary schools saw the largest increase in "A" schools with 30 percent, up from 21 percent a year ago, state officials said. "If we didn't improve, I don't know what else we could have done".
The state said the percentage of schools that earned an "A" or "B" increased to 57 percent.
If Florida schools had a year book, Miami-Dade would hands down win "most improved". "We will continue to implement stronger leadership and instructional support structures for these schools, which will result in a continual increase in student achievement".
The number of schools receiving an A doubled to six from previous year.
Sarasota County Schools has earned another A grade for the 2016-2017 school year from the Florida Department of Education, and is one of only two districts in the state to have earned an A every year since grading began in 20014.
More than 40% of the Martin County schools received an A and just as many received a B and just three schools were rated C, in 2017. Boynton Beach High went from a D to a C. Olympic Heights in Boca Raton moved from a B to an A. It has become clear to our community that each school's progress can not be represented by a single assigned letter grade.
Of Duval's two F grades, only one, Ramona Boulevard Elementary, is a traditional school.
"I am proud that more than two-thirds of the schools that were being monitored through the school improvement program improved to a C or better".
Palm Beach County School District held on to its B rating, as did each of Florida's other six large urban districts, including Broward and Miami-Dade counties.
In Broward, nearly 36 percent of schools serving populations in which at least 7 in 10 students are poor improved their letter grade.
Fifteen Lake schools increased at least one letter grade, four schools dropped a grade and 26 schools remained the same, according to the education department's annual report.
More than 70 schools in the three counties made the state's list of the lowest performing elementary schools, based on English language skills and learning gains.