Ron has taught math for 15 years, and written math textbooks for another 15. He also wrote Great Adventurers of the 20th Century, The 7 Wonders of the World, Waterfalls of the States, The Southern ...view moreRon has taught math for 15 years, and written math textbooks for another 15. He also wrote Great Adventurers of the 20th Century, The 7 Wonders of the World, Waterfalls of the States, The Southern Sixers, and 150 South Carolina Waterfalls.view less