With Sebring High School slipping from a C to a D grade, the district's three high schools, all with D grades, continue to be the low point in accountability for the Highlands County School District.
Avon Elementary School made the greatest progress by improving from a C to an A, according to a grade report released Thursday from the Florida Department of Education.
Fred Wild Elementary went from a C to a B and Lake Placid Middle School went from a B to an A.
School grades are based on a point system where schools are awarded one point for each percent of students who score high on the Florida Comprehensive Assessment Test or make annual learning gains.
Cracker Trail and Sun 'N Lake elementary schools missed an A grade by 1 point.
Along with Avon Elementary, six other schools in Highlands County earned an A grade: Lake Country, Lake Placid and Park Elementary schools and Hill-Gustat, Lake Placid and Sebring Middle Schools.
The district maintained its B grade, which is based on the school grades.

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