MJM312 Denver School of Science and Technology mathematics teacher, Mark Heffron (cq) teaches his 11th grade pre-calculus class Monday morning. The school is one of two Denver high schools to attain the state's "excellent" rating and it's doing it with r
MATT MCCLAIN, MJM312 Denver School of Science and Technology mathematics teacher, Mark Heffron (cq) teaches his 11th grade pre-calculus class Monday morning. The school is one of two Denver high schools to attain the state's "excellent" rating and it's doing it with r (12/04/2006), [434285527] . Denver Public Library Digital Collections, accessed 15/12/2025, https://digital.denverlibrary.org/nodes/view/780461