Criss has taught every grade from K - 11 and briefly homeschooled her own children. She has over a 15 years instructing students. From middle and high school math instruction, teaching in Title 1 schools, advanced/ Cambridge math courses, AVID Excel math groups to elementary grade levels in self-contained classrooms and teams. She is also certified teaching mentor, guiding and supporting mentees' with advice, insight and encouragement to help them achieve their goals.