Sabrina Keller, 14, collapsed at a Woodland Park Middle School Dance and was pronounced dead on June 9.
Grief counselors will be on hand as students return to a San Marcos school for the first time since a classmate collapsed and died after a school dance.
Sabrina Keller, 14, collapsed during the dance at Woodland Park Middle School Thursday around 9 p.m.
A bystander started CPR while someone else called 911. Medics flew Keller to Rady Children's Hospital where she was pronounced dead.
An autopsy was inconclusive so investigators are waiting for a toxicology report to learn more about why Keller died.
Just last month Keller won the award for selling the most Girl Scout cookies in San Diego county.
As a prize for selling the most cookies in the county, the Girl Scouts arranged a helicopter ride for Keller.
A memorial service is planned for Tuesday in San Marcos.