Christian Mattes, 15, center, watches his teacher Leslie Peoples discuss a geometry problem at Mesa Verde High School in Citrus Heights, Calif., on Monday, May 23, 2016.
Christian Mattes, 15, center, watches his teacher Leslie Peoples discuss a geometry problem at Mesa Verde High School in Citrus Heights, Calif., on Monday, May 23, 2016. Hector Amezcua hamezcua@sacbee.com
Christian Mattes, 15, center, watches his teacher Leslie Peoples discuss a geometry problem at Mesa Verde High School in Citrus Heights, Calif., on Monday, May 23, 2016. Hector Amezcua hamezcua@sacbee.com