John A. Benner has an M.A. in chemistry from The University of Texas at Austin. He has worked as an analytical chemist, a science editor and content consultant, and a freelance writer. His past projects include chemistry, physics, and physical science textbooks for Holt, Rinehart and Winston and several titles in the True Books series for Children’s Press. John’s work for CK-12 is his first contribution to open-access publishing. He currently works as a computer programmer in Austin, Texas.