Rachel Scott once stood in the rain for three hours holding an umbrella for a young man while he fixed his flat tire.

She also sat down with new students and ate lunch with them in the cafeteria at Columbine High School in Littleton, Colo.

That all ended when her life was taken by Eric Harris who said, “I believe I can start a chain reaction through violence.”

On April 20, 1999, 12 students died along with their killers, Harris and 17-year-old Dylan Klebold in the nation’s deadliest school shooting.

Now, almost three years later, Rachel’s father, Darrell Scott, tells of a chain reaction of kindness to thousands of students throughout the country.

Scott will speak at 8:30 p.m. Wednesday in Schofield Auditorium. The event is sponsored by Student Impact.

Students should respond to Scott’s message through simple acts of compassion, sophomore Steve Sheurman said.

“One person’s life can impact people,” he said.

Scott helps students achieve this “chain reaction of kindness,” through five values.

One value is forgiveness and in his speech he will give steps to forgiveness and other values.

Scott’s commitment has kept him on the road for the last two years. His two other daughters and two volunteers help him plan his schedule and funds.

Former teachers Sue Kraft and her husband distribute publicity materials where Scott speaks.

“The greatest reward is seeing that Rachel’s life and testimony continues to spread for good,” Kraft said.

Rachel’s chain reaction is an ideal most strive to achieve but forget in their busy lives, said religious studies assistant professor Charlene Burns.

She said Rachel spent her whole life as one link of that chain because of her compassion.