The following is excerpted from A Fraction of a Point: A Gymnastics Dynasty on the Line, by Nina Mandell. Published by Kent State University Press. Reproduced by permission. The book is available for purchase now. With the Brecksville-Broadview Heights High School gymnastics team’s state win streak at five years old, Andrea Kinzer stood over her teammate Diana Moock, watching her as she sat on the ground calculating the scores from other teams …