Mark Spong is a contributing author for CK-12. Mark earned a B.A. in Mathematics from Harvard College in 2008, an M.A. in Education from Stanford University in 2008, and an M.S. in Mathematics from the University of Connecticut in 2013. Mark taught math at the high school level for four years before returning to graduate school. He is currently an actuary. While teaching high school, Mark was a Knowles Science and Math Teaching Fellow and was featured on local radio and television for innovative teaching practices. He is passionate about using data effectively to inform teaching and has published and presented on his use of "Data Driven Instruction." Mark is proud that more people will have access to free, high quality educational content through CK-12.