OGAP is a systematic, and intentional formative assessment system grounded in the research on how students learn mathematics. The OGAP system is seamlessly integrated into a set of tools, practices, support materials, and in-depth professional development.

OGAP is not a curriculum, but is used on an ongoing basis to enhance the existing math program. Teachers choose appropriate items from a databank of carefully constructed items, administer them in their classrooms as “exit slips” or quick assessments, and use OGAP learning trajectory frameworks to analyze the underlying student thinking that can guide future instruction to deepen student understanding.

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