According to her family, the St. Louis high school teacher who was shot Monday by Orlando Harris, the teenager who carried out the shooting, has passed away. She did her best to safeguard her pupils.

According to her daughter Abby Kuczka, Jean Kuczka, a teacher of Health and Physical Education at Central Visual and Performing Arts High School, confronted Harris to protect her students when he burst into her classroom and opened fire with an AR-15-style rifle.

“My mom loved kids,” Abbey Kuczka said to the St. Louis Post-Dispatch. “She loved her students. I know her students looked at her like she was their mom.”

Before he was killed by police in a shootout, Harris, 19, fatally shot Alexandria Bell, who was in the tenth grade. According to witnesses who survived the shooting, Harris allegedly attempted to target further pupils, but his rifle jammed.

The juvenile gunman who carried out the attack wrote a statement in which he described his solitary existence as the  “perfect storm for a mass shooter.”

According to her daughter, her mother had expressed worries about the level of safety at the school in the months preceding up to the incident in which a pistol was carried into the building by a student from a neighboring school.

“She mentioned that, but other than that, she didn’t really think anything” about safety concerns, her daughter said. “I mean, I think people think it will never happen to them.”

Glenn Barnes, one of Kuczka’s coworkers at CVPA, referred to her death as “a huge loss.”

“Jean Kuczka was an amazing educator. She loved her students and helped them make a difference in the school and community,” Barnes wrote on Twitter.

“This was her first year of empty-nesting, and she was looking for something extra to do,” Abbey said. “She was definitely looking forward to retirement though. She was close.”

Kuczka is survived by her husband, five children, and seven grandchildren.“I cannot imagine myself in any other career but teaching,” Kuczka wrote. “I believe that every child is a unique human being and deserves a chance to learn.”