Over the past 30+ years, I have led hundreds of workshops for math teachers, at all grade levels and all over the country. Among those, the sessions I presented to Math Teacher Circles in San Jose, Palo Alto, and San Francisco stand out. These circles attract participants with a deep interest in both mathematics and teaching, who welcome tough problems and who are likely to take back what they learn to their students and their colleagues. There is no better way to support math education for Bay Area students.