BATON ROUGE - For the second straight year, Louisiana's public school performance scores will come out late.

State education department spokeswoman Bridget Devlin says the department will release the grades toward the end of November, not in October as usual.

New national exams for grades 3-8 held up the 2015 scores until late December. Though the tests have changed again, the delay this year is due to disaster.

Devlin said that the department's staff was significantly impacted by the August flooding, contributing to the delay.

The 150-point school performance scores are based largely on test results and graduation rates that came out over the summer.