The 11th annual Putnam City Cancer Classic will take place on Nov. 3 at Wheeler Park on the Oklahoma River.
Over the past 43 years, Putnam City students, teachers and families have raised more than $3.6 million to combat cancer.
More than 30 students from Putnam City Schools spent time in labs OMRF this week.
PC Schools made a significant donation to cancer research for the 42nd consecutive year.
OMRF opened its doors for 17 elementary-school scientists on Tuesday.
For the past 41 years, the PC Schools have partnered with OMRF to fight cancer.