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In this interview, Michael Horn talks with Joel Rose, founder and CEO of New Classrooms, about the organization’s Teach to One Math model and its broader implications for K‑12 education. Rose explains how Teach to One replaces the traditional classroom with an open‑space, station‑based environment where each student follows a daily “playlist” of activities—teacher‑led, collaborative, and software‑driven—generated overnight from diagnostic data. He describes the “iceberg problem,” where state‑level grade‑level assessments and accountability policies force schools to set rigid floors and ceilings, preventing the deep personalization needed to address students’ gaps. The conversation shifts to the COVID‑19 learning loss, arguing that the pandemic highlights the need to move from coverage‑oriented schedules to mastery‑focused, diagnostic‑driven instruction. Rose outlines a three‑step implementation framework: (1) adopt a skill map that defines prerequisite relationships among roughly 300 middle‑school math skills; (2) use diagnostics (currently limited, but New Classrooms is developing skill‑level assessments) to locate each student on the map; and (3) make design choices about core vs. supplemental programs, grouping, and modality mix. He discusses practical timing for diagnostics, the importance of social‑emotional safety, and how schools might bundle diagnostics with the Teach to One model. Rose also shares examples of innovative districts (Miami‑Dade, North Dakota, Georgia, Nebraska, Texas Math Innovation Zones) and forecasts that 5‑15 % of schools may adopt such personalized models post‑pandemic. Finally, he calls for policy changes that align incentives with instructional goals and for increased R&D investment to supply new learning models across subjects, noting that the lack of a robust innovation pipeline has kept the factory‑model classroom alive for a century.

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