LOS ANGELES (CBS) —This year’s state standardized test results have been delayed while California education officials investigate dozens of photos leaked online.

More than 400 images of state standardized tests were found posted on social networking sites like Facebook. Most of the images were illegible, but about three dozen test questions were in focus and clearly readable.

In the Los Angeles Unified School District, North Hollywood High School was identified as having at least one student involved. Principal Dr. Randy Delling says anyone who’s surprised isn’t paying attention, KNX 1070′s Margret Carrero reports.

“We have plenty of evidence that students are absolutely blowing this test off at a rate of two-thirds because they can,” Delling said. “It doesn’t affect their graduation, they still graduate being completely far below basic, they still get into college, so there’s absolutely no bottom line stake for the students in the test.”

Millikan High in Long Beach is also believed to be part of the leak.

Individual school scores are now under review and campuses could face sanctions ranging from lower API scores to lost grants.

A spokeswoman for the California Department of Education says the scoring formula for the schools where students exposed the questions is being adjusted to eliminate those items without affecting test results.

The investigation has delayed the statewide release of results by two weeks, until Aug. 31.