Classes resumed Friday at Chardon High School where lone gunman T.J. Lane, 17, this week allegedly took a knife and a .22-caliber handgun from his grandfather's barn and, while waiting in Chardon's cafeteria for a bus to take him to a vocational school, turned the weapon on students around 7:30 a.m. and began firing, killing Daniel Parmertor, Russell King and Demetrius Hewlin.
Joy Rickers, 18, and Nick Walczak, 17 were wounded with serious injuries.
Lane turned himself in to two bystanders outside the school.
The incident stunned the small town of 5,000 where the families of King and Hewlin said they wanted to help others by donating their sons' organs, NBC News reported.
"Demetrius' death was not in vain," Hewlin's mother, Phyllis Ferguson, said. "Demetrius had donated his organs. And for Demetrius' one life, he change eight lives."
Parents and students marched to school together Thursday. Each student was given a hug before going in for a discussion and counseling session.
Lane has been charged with three counts of aggravated murder, two counts of attempted aggravated murder and one count of felonious assault, NBC said.