Rebstock, 22, died early Tuesday, and by afternoon, word spread to classmates and friends who came to the school to share their memories and their loss.
"A lot of the kids (from her class) are back from college and they all wanted to be together," Stiles told the Herald. "She impacted so many people."
Spokane police said it appeared Rebstock returned home from work about midnight and parked her car at the top of a steep driveway.
Police believe the car rolled backward and Rebstock was pinned underneath when she tried to stop it.
She died at the scene, said the Spokane Medical Examiner's Office.
Rebstock graduated from Southridge in 2008 and made the honor roll several times, Herald archives showed.
She was a member of the Heatwave Dance Team, which won a state dance title as well as the 3A Division Hip Hop Dance title while Rebstock was on the team.
Her mother, Wendy White, and grandmother, Patty White, run The Dance Class studio in Richland.
Stiles said Rebstock was a leader who inspired and motivated her teammates and was well-loved by classmates.
"She was a beautiful girl. This is an incredible loss," Stiles said. "From 2004 to now, she has been a part of the school. That's a lot of Southridge students connected to her. She was an extremely talented, kind, giving girl."