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, 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 2023-2024 school year of the Expansions program.


New!  For the 2023-2024 school year, Expansions now offers a high school track.  To learn more about Icosahedron (for students in grades 9–12 who routinely find the roots of quadratics), which will be held on select Sundays, from 3:30 pm to 5:00 pm, please visit icosahedron.momath.org.

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; and Saturdays, 10:15 am to 11:00 am.
      • Hexahedron: for those who have conquered multiplication and division (approx. grades 3–4) — Thursdays, 4:00 pm to 4:45 pm; and Saturdays, 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; and Sundays, 10:15 am to 11:00 am.
      • Dodecahedron: for those with functional knowledge of functions (approx. grades 7–8) — Thursdays, 4:15 pm to 5:00 pm; and Sundays, 11:15 am to 12:00 pm.
      • Icosahedron: for those who routinely find the roots of quadratics (approx. grades 9–12) — Sundays, 3:30 pm to 5:00 pm.

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.


The Fall 2023 semester will run from Tuesday, September 26, 2023, through Thursday, January 25, 2024.

Fall Semester Tuesdays: September 26, October 10, October 17, October 24, October 31, November 14, November 21, November 28, December 5, December 12, December 19, January 2, January 9, January 16, and January 23. No class on October 3.

Fall Semester Thursdays: October 5, October 12, October 19, October 26, November 2, November 9, November 16, November 30, December 7, December 14, December 21, January 4, January 11, January 18, and January 25.  No class on November 23.

Fall Semester Sundays: October 22, October 29, November 5, November 12, November 19, December 3, December 10, and December 17.  No class on November 26.

The weekend winter 2024 semester will run from Saturday, January 20, 2024, through Sunday, February 25, 2024.

Weekend term Saturdays: January 20, January 27, February 3, February 10, February 17, and February 24.

Weekend term Sundays: January 21, January 28, February 4, February 11, February 18, and February 25.

For Icosahedron, the 2024 winter semester will run from Sunday, January 13, 2024, through Sunday, February 18, 2024.

Icosahedron Sundays (3:30 pm to 5:00 pm): January 14, January 21, January 28, February 4, February 11, and February 18.

The Spring 2024 semester will run from Tuesday, January 30, 2024, through Tuesday, June 4, 2024.

Spring Semester Tuesdays: January 30, February 13, February 27, March 5, March 12, March 19, March 26, April 2, April 9, April 16, May 7, May 14, May 21, May 28, and June 4.  No class on February 6, February 20, nor April 23.

Spring Semester Thursdays: February 1, February 8, February 15, February 29, March 7, March 14, March 21, March 28, April 4, April 11, April 18, May 2, May 9, May 16, and May 23.  No class on February 22.

Spring Semester Sundays: To be announced.


Participation in the 2023–2024 academic year will require full-semester enrollment.  For weekday Tetrahedron, Hexahedron, Octahedron, and Dodecahedron, registration fees are $950 per semester, or $1,700 for the full year.  For weekend Tetrahedron, Hexahedron, Octahedron, and Dodecahedron, registration fees are $450 for the winter term.  For Icosahedron, the registration fee is $595 for the winter term.  (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.


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.