The grade cards for 1,785 individual public schools were certified and made public Nov. 6.
More than three dozen schools in Oklahoma City Public Schools, the state's largest district, received failing grades, up from one school the previous year.
Of the district's 93 schools, 18 schools improved, 10 schools stayed the same and 65 schools decreased. Last year's district grade was a D.
“It's certainly disappointing but our community and our children deserve better than this,” said Dave Lopez, the district's interim superintendent. “And our teachers and leadership are focused on being much better the next time the grade reports are given.”