Andrew Stadel Professional Development

Andrew Stadel is a mathematics teacher, coach, and consultant based in California who provides purposeful, hands-on professional development designed to help educators make mathematics more accessible and enjoyable for all students. Best known as the creator of Estimation 180—a collection of over 200 visual estimation challenges used by teachers worldwide to develop students' number sense and reasoning—Andrew brings practical instructional strategies and clear action steps that translate immediately into classroom practice. His professional development sessions focus on strengthening teachers' instructional strategies through active, participatory learning experiences. Andrew draws on his classroom experience and coaching background to address topics including building number sense, standards-based grading, project-based learning, and instructional coaching. His workshops are designed so that educators leave with concrete strategies they can implement the very next day. Since launching Estimation 180 in 2012, Andrew has become a sought-after presenter and consultant, working with schools and districts to foster mathematical thinking and engagement. He also hosts the Estimation 180 podcast, sharing teacher tips and strategies for helping every student make sense of mathematics.