How important are math teacher recommendation letters for MIT admissions?

For MIT, a math or science teacher recommendation is not just especially valuable, it is typically required. MIT asks for two teacher evaluations: one from a math or science teacher and one from a humanities, social science, or language teacher.

That said, the letter is not important just because the teacher teaches math. What matters most is whether the recommender can describe how you think, how you handle difficult material, how you engage with problems, and how you contribute in class. For MIT, a useful math teacher letter often speaks to intellectual curiosity, persistence, creativity in problem-solving, and readiness for advanced quantitative work.

If you are applying as a STEM-focused student, a detailed and enthusiastic math recommendation can be especially helpful because it gives MIT direct evidence about your fit for their academic environment. A generic letter from a well-known teacher is usually less useful than a specific letter from someone who has seen you wrestle with challenging concepts, ask strong questions, or go beyond the class.

If your best STEM connection is with a physics, chemistry, or biology teacher rather than a math teacher, that can still satisfy MIT's math/science requirement, but if math is central to your profile, a strong math teacher letter is often the most natural choice.

So yes, math teacher recommendations carry real weight at MIT, both because MIT specifically asks for a math/science perspective and because they want evidence of how you perform in rigorous quantitative settings. The best one will be concrete, personal, and focused on how you learn, not just on your grade.