Website sponsored by Marilyn Burns introduces Math Reasoning Inventory

Math Solutions
Math Solutions

With support from the Bill & Melinda Gates Foundation, mathematics educator Marilyn Burns worked with a team of colleagues to develop the Math Reasoning Inventory (MRI). This online assessment is available now, free of charge to all teachers.

MRI is a formative assessment tool that focuses on numerical reasoning. The core of MRI is a face-to-face interview: you ask your students questions, you probe their thinking and listen to how they reason, and you learn what they understand.

For more information about this tool, including video clips of teachers using it to interview students, visit

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