Bristow Public Schools  

Membership 1999

Collinsville Public Schools

Membership 2008

Guthrie Public Schools  

Membership 1990

Jenks Public Schools  

Founding member 1988

Morrison Public Schools  

Membership 1997

Owasso Public Schools  

Founding member 1988

Perkins-Tryon Public Schools  

Membership 1995

Perry Public Schools  

Founding member 1988

Sapulpa Public Schools  

Founding member 1988

Skiatook Public Schools  

Membership 2000

Stillwater Public Schools  

Founding member 1988