CAZENOVIA, Wis. (AP) _ Students at a school where the principal was fatally shot by a teen gunman last week returned to classes Thursday, clad in T-shirts that called the leader a superhero.

Witnesses said John Klang, 49, disarmed the shooter even though he was injured. Classes at Weston Schools resumed a day after the principal's funeral, and a majority of the school's 370 students in grades kindergarten through 12 were at their desks, said Jane Huth, a school secretary.

Huth said everyone, from students to staff, wore royal blue T-shirts decorated with a big ``W'' and the words ``John Klang is my superhero.'' The school planned to take a group picture during a tree planting ceremony in Klang's honor.

Counselors were available, and an armed sheriff's deputy was stationed at the front entrance.

Laurie Bill, who has two children in Weston Schools, said she has tried to reassure them.

``You just try to explain to them that it doesn't happen every day, and things happen in the world that we don't like but we have no control over,'' she said.

Eric Hainstock, a 15-year-old freshman now charged with first-degree intentional homicide, is accused of walking into the school last Friday and shooting Klang three times with a pistol. The shooting occurred inside the main entrance after a janitor wrestled a shotgun from the boy.

Hainstock told detectives he was upset with Klang because the principal disciplined him a day before the shooting for having tobacco in the school, according to a criminal complaint.

Hainstock also was upset because Klang and teachers failed to stop a group of kids who had been harassing him, calling him gay, the complaint said.

The shooting was one in a series of violent acts in schools nationwide in the past two weeks. Fatal shootings have happened at three schools in three states, and several others across the country have been threatened.