NCTM's Interactive Institutes offer two and a half days of face-to-face, in-depth professional development provided by experts in mathematics education.
Benefit from everything NCTM Institutes offer, including:
Engaging Students in Learning: Mathematical Practices (Grades K-8)
Engaging Students in Learning: Mathematical Practices (High School)
Algebra Readiness Institute (6-8)
Number and Operations Institute (Pk-5)