We’ve previously written about the School Time program on WLS Chicago, which started in 1937. Every day at 1:00 PM, the station carried a program especially for school children, which was played in many schools in the region.

Eighty years ago, the station boasts in this ad on the cover of Broadcasting magazine, November 20, 1944, about how successful it was. The station reports that a single announcement offering a color map of the Brookfield Zoo. 5,629 letters flooded the station asking for a copy of the map. While the ad noted that the School Time program wasn’t for sale, they had plenty of programs that were, and an ad on the station promised to deliver results.