An audit conducted in the wake of grade tampering allegations at Douglass High School in Oklahoma City finds 81 percent of seniors need additional credits or state tests to graduate.

"We had policies and procedures which weren't followed, to a point that it was sickening," Oklahoma City Public Schools Superintendent Karl Springer told reporters on Thursday.

The district's implementing a program which includes night school and Saturday classes, among other venues. Springer said they're meant to help seniors with English, Algebra, Biology, History and a host of other subjects.

"We did not fail our students," Oklahoma City Public Schools Board Chair Angela Monson said. "Unfortunately, there are students in this particular school who have an extreme challenge ahead of them."

In October, Douglass Principal Brian Staples was placed on paid administrative leave, after a federal investigation was launched into allegations of grade tampering and attendance records alterations.

"I think the buck stops with the school superintendent," Springer said. "I think the issue here is this, to me, is something I hate to see happen under my watch."

(Pictured: Oklahoma City Public Schools Board Chair Angela Monson speaks as district Superintendent Karl Springer (R), listens. At left are: interim Douglass Principal Barbara Davis (next to Monson), and Board Advisor Joyce Henderson.)