Math Recovery® Specialist: Part 1 is a year-long professional development course that builds a high level of expertise in Math Recovery® content and pedagogy. Math Recovery® Specialist: Part 1 focuses on the teaching and learning of number concepts in the primary grades. As a part of the course, participants engage in working 1:1 and in small groups with students. The Math Recovery® Specialist is well prepared for providing targeted intervention with students and is a valuable resource for supporting school- or district-wide mathematics initiatives. Successful completion of the Math Recovery® Specialist certification qualifies participants for the Add+VantageMR® Champion course, which would allow them to lead and support Add+VantageMR® professional development for teachers in their school district. Math Recovery® Specialist: Part 1 includes the comprehensive, research-based Learning Framework in Number, offering detailed learning progressions and pedagogical tools for assessment and teaching. The course is a blended learning experience that includes nine days of face-to-face learning along with independent learning modules, virtual team meetings and support, 1-on-1 coaching, and opportunities for collegial engagement. Course participants receive assessment and teaching materials to support the implementation of Math Recovery® intervention.