Expansions: MoMath’s gifted math program to engage and challenge NYC’s brightest math students

Application Process | Schedule | Pricing | Policies

What is Expansions, the gifted program at MoMath?

Featuring programs for mathematically gifted students enrolled in 1st through 12th grades, the Expansions workshops are designed and delivered by MoMath’s educational team to illuminate the wonders of mathematics, challenge and inspire students, and broaden their mathematical horizons.  With topics ranging from fractals to cellular automata, these afternoon classes provide an opportunity for participants to learn advanced and fascinating topics not included in the standard K-12 curriculum.  Plus, your child can benefit from enjoying math together with small groups of talented and focused young scholars.

MoMath is currently accepting applications for limited spots in the fall 2019 semester.  Click here to start your application.

MoMath is delighted to announce a new high school track taught by International Math Olympiad participant and trainer Paul Zeitz, who is also the co-founder and Board Chairman of Proof School, co-founder of the San Francisco Math Circle, co-founder of the Bay Area Math Olympiad, and author of The Art and Craft of Problem Solving.  Click here to learn more and apply for the Icosahedron sessions for grades 9-12.

Three boys working on math activity

Expansions offers the following weekly sessions, which are differentiated by mathematical experience, rather than by age or grade.  Grade levels shown parenthetically provide rough guidelines, and final placement is based on demonstrated student ability.

  • Tetrahedron: For those who are comfortable with addition and subtraction (approx. grades 1-2) — Tuesdays, 4:00 pm to 4:45 pm.
  • Hexahedron: For those who have conquered multiplication and division (approx. grades 3-4) — Thursdays, 4:00 pm to 4:45 pm.
  • Octahedron: For those who know the facts about fractions (approx. grades 5-6) — Tuesdays, 4:15 pm to 5:00 pm.
  • Dodecahedron: For those with functional knowledge of functions (approx. grades 7-8) — Thursdays, 4:15 pm to 5:00 pm.
  • Icosahedron: For those who routinely find the roots of polynomials (approx. grades 9-12) — Sundays, 4:00 pm to 5:30 pm. Click here to learn more and apply for the Icosahedron sessions.

Once accepted into the program, students may register for their assigned class series and must register in advance.

Application process

MoMath’s Expansions program offers a small class size approach, hands-on lessons, and a long-term, cohort model that builds dynamic groups of students who learn effectively together and return year after year.  New students are welcome at all levels provided there is availability or sufficient interest to form a new cohort.

Applications are considered on a rolling basis as spots become available.  To apply, please fill out this online form and follow the instructions provided upon submitting the form.


The fall 2019 semester will run from Tuesday, September 24, 2019, through Thursday, December 19, 2019.


Participation in the 2019-2020 academic year will require full semester enrollment.  Early bird registration fees are $850 per semester.  (Members at the Membership Squared level or above will receive a 10% discount).  MoMath does not prorate fees for mid-term registrations, and refunds will not be given for absences or for any other reasons.  Museum admission is not included in the registration.

Need-based scholarships are available.  Scholarship applicants must meet the income guidelines of the federal Free and Reduced Lunch program and provide verification of household income.  Scholarship applicants should complete the regular application form online and send a separate email to scholarships@momath.org with a request for scholarship application instructions.  Please allow at least two weeks for the scholarship committee’s review process.


MoMath will make every effort to run classes as scheduled, but occasionally severe inclement weather or other unusual circumstances beyond MoMath’s control may require that a class be cancelled.  If such a cancellation occurs, MoMath may, at its sole discretion, offer make-up sessions.

Note that grade-level sessions will run only if a minimum number of participants is reached before the start date of the full session.  In the rare event that a grade-level series is cancelled, registrants will be notified and provided with a full refund.

MoMath does not provide make-up classes for absences.  Each Expansions series accepts a limited enrollment in order to provide individualized attention to each student.  While many reasons may cause a student to miss a class, a registered student holds a reserved seat while others may be turned away due to limited capacity.  Additionally, the Museum provides staffing, materials, and other resources based on registration.  For these reasons, the Museum has a strict no-refund and no make-up policy.

Adult chaperones are required to wait outside the classroom during classes.  In the event that a class is scheduled to end after 5:00 pm, adults must wait in Additions, the shop at MoMath, and students will be brought to Additions for dismissal.

All Expansions participants are expected to exhibit good behavior to ensure a positive experience for all participants.  At its sole discretion, MoMath may remove a student from the Expansions program for behavioral reasons.  If a student is removed for behavioral reasons, for either the day or the remainder of the program, no refund will be provided.