Retired coalminer Roger Sliva lectured on coal to sixth-graders at John Gregg Elementary as part of their science studies on rocks and minerals. Sliva, of Adena, discussed how his family worked in the industry as well as the types of coal and methods of strip and deep mining found in the area. He also displayed headlamps and other equipment, samples of ore and photos of major earthmovers such as the Silver Spade and Gem of Egypt for the students to peruse.