D squared Math Toolbox

Daniel De Sousa

Mathematics 7-12 Educator

ddesousa@schools.nyc.gov

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Summary

Experienced and award-winning Licensed 7-12 Secondary Mathematics Teacher with over 9 years teaching courses such as Algebra, Geometry, and Precalculus in both the general education and an integrated co teaching setting. Leading the mathematics department for over 8 years, supporting staff developments, and promoting equitable instruction through coaching and lab classrooms. I contributed to the citywide curriculum implementation and advocated for all students through the NYCPS Solves advisory team.

Experience

Business Technology Early College High School, Queens Village

Mathematics Teacher

September 2017 - Present

  • Algebra Next Generation/Common Core (General Education and ICT)
    • Developing a problem solving based curriculum (Illustrative Mathematics)
    • Sharing highly effective IM practices to NYC DOE through Lighthouse Visits and Video project. Video examples (log in with DOE credentials): Video #1, Video #2, Video #3, Video #4, Video #5
  • Algebra (Pro)
    • A course designed to support all students in algebra 1 as well as expose students to topics needed for future mathematics courses that are not typically taught.
  • Geometry Next Generation/Common Core (General Education and ICT)
    • Developing a problem solving based curriculum (Illustrative Mathematics)
  • AP Precalculus (General Education and ICT)
  • Precalculus (General Education and ICT)

Mathematics Content Leader / Instructional Leadership Team (ILT)

September 2018 - Present

  • Leading the mathematics team meeting weekly
  • Running inquiry cycles to assess various trends across mathematics courses
  • Constructing intervisitation/rounds cycles (Research Based intervisitation cycles)
  • Developing Mathematics curriculum
  • Vertically aligning curriculum
  • Preparing, facilitating, and taking part in intervisitation cycles
  • Hosted a Math Night (Math Matters) · See here

NYCPS Solves Advisory Team

September 2024 - Present

  • Selected to serve on the NYCPS Solves Advisory Team, providing monthly feedback to central leadership on the rollout of the Illustrative Mathematics curriculum. Through this experience, I had the opportunity to advocate directly to the Chancellor for increased teacher support in meeting the needs of students with disabilities and multilingual learners.

Model Teacher

September 2022 - Present

  • Promoting effective instructional practices that benefit all students
  • Supporting new teachers through the New Teacher Academy
  • Running a lab classroom where all teachers feel welcomed and comfortable in a space where staff and I can learn, grow, and reflect

Peer Collaborative Teacher

September 2026 - Present

  • Promoting effective instructional practices that benefit all students
  • Creating and facilitating professional learning for the school community
  • Coaching 1-1
  • Supporting new teachers through the New Teacher Academy
  • Running a lab classroom where all teachers feel welcomed and comfortable in a space where staff and I can learn, grow, and reflect

Professional Development / Instructional Leadership Team Coordinator

November 2022 - Present

  • Creating and supporting the professional learning that takes place at BTECH
  • Coaching
  • All expectations can be seen here

TIME 2000 Math Conference Presenter

2023 - Present

  • Presenter at the TIME 2000 Conference. This conference invites schools from all over NYC to have a day of learning and loving math.
  • Presented: Games and Puzzles of Mathematics. An interactive session where students see that mathematics is more than just the typical functions, trigonometry, and solving equations.

EdTeach NYC Presenter

2026

  • Beyond AI Hype and Backlash: What's Actually Working for Teachers?

Queens College Behavioral Management Presentation

2018 - Present

  • Yearly presentation: speaking to preservice mathematics teachers about behavior management strategies based on my experiences and aligned to their coursework.

ResearchED NYC Presenter

2026

  • Co-presented with Tricia Taylor on grounding school-wide guiding principles in the science of learning, making instructional thinking visible through live modelling and short video exemplifications

Social Emotional Learning Coordinator

2018 - 2023

  • Meeting once a week to plan and create upcoming community days
  • Creating and developing SEL Curriculum
  • Leading school wide professional developments teaching and informing staff about SEL strategies, lessons, and upcoming events happening at our school
  • Training students in being facilitators of community group

Music Club Facilitator

September 2017 - Present

  • Promoting a positive and welcoming environment where students learn and/or play music.
  • Facilitating talent shows and other major school events

Certification

New York State Professional Certificate, Mathematics, Grades 7-12

Awards and accolades

  • Green Apple Award (2025) · Educators for Excellence
  • NYCPS Solves Teacher Spotlight (2025) · Newsletter
  • Big Apple Fellowship Award (2024) · Recommendation Letter
  • The Mary Felicetti Memorial Award: Excellence in Mathematics Mentorship and Supervision (2023)
  • The Alice Artzt Award for Excellence in Mathematics Teaching (2021)
  • Co-authored, The Inspirational Untold Stories of Secondary Mathematics Teachers
  • Co-facilitated a presentation at Limacon (Long Island Mathematics Conference): From Power Pairs to Loving Mathematics and Teaching
  • TIMES Magazine contributions
    • Self-Regulated Learning is at the Core of My Instruction
    • Now More Than Ever: Developing Self-efficacy through Mindset and Combating Gender Stereotypes

Education

Skills

  • Creating and editing videos in Adobe Premiere Pro
  • Proficient in Microsoft Office, Google Workspace
  • Creating and working within Desmos/GeoGebra
  • Self-taught piano and guitar
  • Instructional Coaching & Professional Learning Facilitation
  • Curriculum Development & Adaptation
  • LaTeX Document Creation
  • Assessment Design & Data Analysis

References available upon request.