About me
Resume
- NYS Professional Certificate, Mathematics 7-12
- Teaching since 2017; math department leader since 2018
- Big Apple Fellowship (2024) and Green Apple Award (2025)
Hi, I'm Dan De Sousa. I teach math at a public high school in New York City, where I'm also the math department chair and instructional coach, and I lead professional learning for our school.
This site is a home for my work and the tools I create for my students and myself. I want every student to learn to love and appreciate mathematics. One way I do that is by creating visuals that let students see the math in action.
This year (2026‑2027)
- AP Precalculus
- Algebra 1 (Regents)
- Professional learning for my school, which I run and coordinate
- New Teacher Academy for Year 1 and 2 teachers, which I facilitate
What matters in my classroom
- Student reasoning and discussion
- Understanding and fluency, built together
- Joy and rigor in the same lesson
- Clear goals: what we're learning and how we'll know
Outside school you'll find me playing guitar (a big John Mayer fan), pulling espresso, or cooking.
Questions, ideas, or want to use something here?ddesousa@