Harry Sintz, right, a science teacher at Lyndora School, helps fourth graders from Rooms 11 and 12 pack bottles and cans for recycling on Jan. 14, 1974. The project was part of the students' science unit called "Managing the Earth's Resources." From left are Russ McCombs, 10, Leslie Buol, 9, Steve Wissinger, 11, and Angie King, 9. Behind them are some of the posters the students made to illustrate the lessons they learned about pollution and cleaning up the earth. For several weeks, the youngsters had been collecting the glass and cans and had already disposed of one 500-pound load. Their teachers, in addition to Mr. Sintz, were Mrs. Kathleen Rutkoski and Mrs. Jenly Hallock, a student intern from Slippery Rock College, which is now Slippery Rock University.