Northbrook, Ill. ? The high school in an affluent Chicago suburb where dozens of girls were brutally hazed last month held its graduation ceremony Sunday with little mention of the scandal that garnered nationwide attention.

Thirty-one seniors were expelled and 20 juniors were suspended from Glenbrook North High School in recent weeks after videotapes surfaced showing senior girls beating junior girls and showering them in filth while other students watched.

“The spotlight has been shining upon us recently and it hasn’t always been pretty,” said Dave Hales, District 225 superintendent.

Graduation speakers Sunday made no mention of the hazing incident, but pointed to a number of achievements by Glenbrook North students in the past year, including the state debate championship and a third-place finish in the state Class AA boys basketball tournament.

But it was the hazing and the lawsuits filed by some students in hopes of overturning their expulsions and suspensions that drew most of the attention to the school this year.

“I feel embarrassed,” said Corey Simmon, clad in his green cap and gown.

The 18-year-old’s father, Paul, had a ready answer as the two stood in the school courtyard.

“This is what’s going on right here,” he said, pointing to smiling students clutching their diplomas.

Twenty-nine seniors involved in the hazing signed agreements stipulating that they complete community service and counseling and barring them from exploiting the incident with a book or movie deal.

The deal enabled them to receive their diplomas, but they were not allowed to attend the graduation ceremony.

Fifteen students have been charged with misdemeanor battery, while two students and two adults were charged with alcohol-related misdemeanors for allegedly providing beer to underaged drinkers.