Senior Director of Math

Senior Director, Math

(Remote, full-time)

Founded as a nonprofit organization in 2020, the National Summer School Initiative (NSSI) partners with schools and districts nationwide to accelerate learning and deepen teacher practice through our distinctive summer programming.

NSSI programming offers districts a new approach to building teacher capacity and driving academic gains. Our mentor teacher model connects some of the country's most exceptional educators with teachers across the nation, equipping and inspiring them to deliver discourse‑rich math and literature lessons that are rigorous, culturally responsive, and deeply engaging.

Through intensive pre‑service training and dynamic weekly professional development sessions, our summer programming focuses on research‑proven instructional practices that accelerate learning. We provide teachers and school leaders with the targeted support and hands‑on practice needed to elevate their craft. Our core belief is simple: teachers get better faster by observing the best and practicing.

Our comprehensive approach combines daily exposure to excellent curriculum, observation of outstanding mentor teachers, targeted professional development to help teachers across the country improve rapidly and effectively, and exceptional operational support.

In 2025, NSSI served approximately 72,000 students. Building from 48,000 students served in 2023, we continue to refine our approach to maximize impact. With a goal of reaching 150,000 students by summer 2028, we are positioned for strategic growth based on our strong track record of results. Students consistently achieve double‑digit learning gains on average across all partner sites, while stakeholder satisfaction remains remarkably high.

The Senior Director of Math is responsible for creating and delivering high‑quality curricula and professional learning that drive student, teacher, and leader growth and achievement. This is achieved by setting a clear vision for curriculum and training, managing a small team of curriculum designers to build and enhance materials, as well as attracting, onboarding, and leading a team of mentor teachers to facilitate impactful training.

The Senior Director of Math consistently uses data to reflect on and improve the effectiveness of their programs, ensuring that partner teachers and leaders are equipped to utilize these resources effectively.

• Define, codify, and champion a clear vision of excellence for math instruction, curriculum, and pedagogy, aligned with NSSI’s mission and goals.
• Stay at the forefront of mathematics education research and best practices, including fluency development, problem solving, explicit instruction, and supports for multilingual learners, and integrate new insights into curriculum and training.
• Build and maintain a library of exemplar math teaching models — including classroom videos, annotated lessons, and sample student work — that bring the vision of excellent math instruction to life.
• Translate the program vision into clear criteria for success and actionable guidance for curriculum development and professional learning.
• Make recommendations for research studies to better understand the impact of our program design on student learning and teacher practice.

• Lead the design, review, and refinement of NSSI’s K–8 math curriculum, ensuring it is rigorous, engaging, and research‑backed.
• Conduct curriculum evaluations using survey data, classroom feedback, student outcomes, and partner input to identify enhancements.
• Develop original, high‑quality curriculum materials across key strands such as fact fluency, skill fluency, problem solving, and interleaved practice.
• Establish quality criteria and oversee outsourced work to ensure consistency with NSSI’s standards.
• Recruit, onboard, and retain a strong team of curriculum developers and consultants to support math content development.
• Partner with copy editors, translators, and design experts to deliver materials that are polished, accessible, and user‑friendly for teachers and…