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

(in person)

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 2021-2022 school year.  Click here to start your application.

Three boys working on math activity

Expansions offers the following levels.  Grade bands (shown parenthetically) provide rough guidelines; 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 ET
      • Hexahedron: For those who have conquered multiplication and division (approx. grades 3-4) — Thursdays, 4:00 pm to 4:45 pm ET
      • Octahedron: For those who know the facts about fractions (approx. grades 5-6) — Tuesdays, 4:15 pm to 5:00 pm ET
      • Dodecahedron: For those with functional knowledge of functions (approx. grades 7-8) — Thursdays, 4:15 pm to 5:00 pm ET

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.  Spots are limited, so please submit your application early.

To apply, please complete this online form and follow the instructions provided upon submission.  Once students are accepted into the program, they may register for their assigned level.


The fall 2021 semester will run from Thursday, September 30, 2021, through Thursday, February 3, 2022.

Fall semester Tuesdays: October 5, October 12, October 19, October 26, November 9, November 16, November 23, November 30, December 7, December 14, December 21, January 4, January 11, January 18, and January 25

Fall semester Thursdays: September 30, October 7, October 14, October 21, October 28, November 4, November 18, December 2, December 9, December 16, January 6, January 13, January 20, January 27, and February 3

The spring 2022 semester will run from Tuesday, February 8, 2022, through Thursday, June 2, 2022.

Spring semester Tuesdays: February 8, February 15, March 1, March 8, March 15, March 22, March 29, April 5, April 12, April 26, May 3, May 10, May 17, May 24, May 31

Spring semester Thursdays: February 10, February 17, March 3, March 10, March 17, March 24, March 31, April 7, April 14, April 28, May 5, May 12, May 19, May 26, and June 2


Participation in the 2021-2022 academic year will require full-semester enrollment.  Registration fees are $850 per semester, $1,500 for the full year.  (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.

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.


As part of New York City’s “Key to NYC” program, MoMath requires all visitors ages 12 and older to show proof of COVID-19 vaccination.  Click here for a list of acceptable forms of proof.  Additionally, every visitor is required to wear a mask.  Click here to learn more about the Museum’s health and safety measures.

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 a particular level will run only if a minimum number of participants register before the start date of the full session.  In the rare event that a particular level 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 may wait in the lobby or in Additions, the shop at MoMath.  In the event that a class is scheduled to end after the Museum closes at 5:00 pm, adults may wait in Additions, and students will be brought there for dismissal.

All Expansions participants are expected to exhibit good behavior to ensure a positive experience for everyone.  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 issued.