The local school is causing Hoppy problems. First Bar 20 cattle are stolen when Hoppy investigates a problem there. Then the new teacher arrives and disrupts the routine of the Bar 20 hands. Later with the Bar 20 hands at graduation, the rustlers are poised to strike again. But there is dissension among them and this will lead to the break that Hoppy needs.
William Boyd
as Hopalong Cassidy
George 'Gabby' Hayes
as Windy Halliday
Russell Hayden
as Lucky Jenkins
Evelyn Venable
as June Lake
Charles Anthony Hughes
as Jud Thorpe
William Duncan
as Buck Peters
Clara Kimball Young
as Mrs. Peters
Emily Fitzroy
as Snooksie
Dickie Jones
as Artie Peters
John Beach
as Quirt
Roy Barcroft
as Sutton
Charles Brinley
as Townsman
