In Sinkholes, early fluent readers learn about the conditions that lead to and result from catastrophic sinkholes. Vibrant, full-color photos and carefully leveled text will engage young readers as they learn about the deadliest sinkholes and how to stay safe in areas with sinkholes. An infographic illustrates how a sinkhole forms, and an activity offers kids an opportunity to extend discovery. Children can learn more about sinkholes using our safe...