The mission of NoCO Math Teachers Circle is to create an opportunity for middle school teachers in Northern Colorado to work on interesting mathematics problems in a setting that enriches middle school teachers’ mathematics content knowledge. By working on rich mathematical problems together, we expect that our participants will enhance their understanding of mathematics and approach mathematical problems more confidently. In addition, we expect that by modeling student-centered and inquiry-based ways of teaching mathematics, our teacher participants will become more comfortable using these teaching strategies in their own classrooms. Finally, we hope to get teachers excited about mathematics, a subject they chose to teach, through fun explorative approaches and to forge new professional relationships among middle school teachers and university mathematics professors.