In addition to teaching AP Biology for more than 15 years, Mark was very involved with the AP Biology community. This includes being active in the AP re-design and serving as an AP Reader, a Table Leader at the reading, and being an item writer for the exam. Additionally, Mark started the AP Environmental Science program at his school. Mark was a member of the first cohort of the BSCS/NABT AP Leadership Academy, works for National Math and Science Initiative (NMSI), the Colorado Science Initiative and as a College Board Consultant, all programs focussed on helping students and teachers prepare for AP science exams. Mark was President of the National Association of Biology Teachers (NABT) in 2013. In 2005, Mark was recognized as the Outstanding Biology Teacher Award for the state of Colorado.