MANSFIELD -- Mansfield Spanish Immersion School principal Gabe Costa turned in his resignation to the Mansfield City School District late Thursday night, district spokesman Larry Gibbs said on Friday afternoon.
Gibbs said he did not know why Costa resigned from Mansfield Spanish Immersion School, the districts leading school, according to academic achievement.
"It was unexpected, I can tell you that," Gibbs said. "There will be a plan for an administrator to be in the building Monday."
Richland Source left a phone message with Superintendent Stan Jefferson.
Costa took over as principal of Mansfield Spanish Immersion in June of 2015 after teaching third grade in the building, Gibbs said.
The school, founded in the fall of 2007, consistenty leads the district in overall academic grades each year, according to the Ohio Department of Education.
Gibbs said he expected an interim-principal to be established next week.
This is a developing story.