Mark Sass was a social studies teacher in the Adams 12 Five Star School District from 1995 to 2022. In 2000, he was part of the leadership team that helped open Legacy High School. Mark was the Executive Director for Teach Plus Colorado from 2016 to 2014. Over the 9 years as ED he built a cadre of policy savvy teachers who have advocated for the profession. Mark was a 2014 Hope Street Group National Teacher Fellow. He was also a 2015 U.S. Department of Eduction Classroom Teacher Ambassador Fellow.