Adventure Comics #138

Matt Briggs hates kids, but the only job he can find is as a school bus driver. Clark and his classmates have won a trip across the country, and Briggs is their driver. Just as they leave, two crooks board with the stolen loot. Using his X-Ray vision Clark spots guns under the their coats. He brings them and their counterfeiting cronies to justice, then (as Superboy) flies the school bus around the world in eighty minutes as a treat for his classmates.