Girls' Angle

05/19/2026

Sixteen years ago, 11-year-old Rowena (pseudonym) made this perspective drawing of a Menger sponge.

For proper perspective, there's a precise mathematical relationship between the lengths of the sides of the sponge in the drawing. Deviation makes the object look like a rectangular block instead of a perfect cube. Rowena invented her own mathematical method to ensure that her drawing exhibits this exact relationship.

It was an early clue that girls go deep when they create their own math projects and inexorably led us to a curriculum-free approach to math education.

It adorns the cover of Volume 3, Number 4 of the Girls' Angle Bulletin:https://girlsangle.org/page/bulletin-archive/GABv03n04E.pdf

(The original was designed to be viewed from 2.5 feet away, so to get the 3D illusion with this scaled version, you have to put your eye pretty close to the screen!)

05/06/2026

Girls. Are. Mathematicians.

05/03/2026

Check out our latest Bulletin, Volume 19, Number 4 at https://girlsangle.org/page/bulletin.php. For more info, check out our blog:
https://girlsangle.wordpress.com/2026/04/30/girls-angle-bulletin-volume-19-number-4/

03/05/2026

Congratulations to all the participants at the 22nd BB&N Middle School Math Collaboration. That was one major challenge, and you all crushed it!

03/05/2026

Check out our latest Bulletin, Volume 19, Number 3 at https://girlsangle.org/page/bulletin.php. For more info, check out our blog: https://girlsangle.wordpress.com/2026/02/28/girls-angle-bulletin-volume-19-number-3/

01/19/2026

Girls' Angle meets resume January 29, 2026!

11/16/2025

Our friends at Athena Film Festival—the premier film festival dedicated to elevating women’s leadership—just released passes for their 2026 festival, taking place March 6-8 at Barnard College! Until Wednesday only, you can snag a Premier Pass for $50 off and get unlimited access and priority seating for all festival films, panels, conversations, plus admission to the Athena Film Festival party. Get yours before the early bird discount ends!

As a passholder, you do not need to register for individual films or events — just pick up your pass from the box office, and head to your venue.

10/31/2025

Check out our latest Bulletin, Volume 19, Number 1: https://girlsangle.org/page/bulletin.php
For more on this issue, check out our blog:
https://girlsangle.wordpress.com/2025/10/31/girls-angle-bulletin-volume-19-number-1/

10/20/2025

Check out our latest Bulletin, which came out on August 31: https://girlsangle.org/page/bulletin.php

For more on this issue, check out our blog: https://girlsangle.wordpress.com/2025/08/31/girls-angle-bulletin-volume-18-number-6/

06/30/2025

The electronic version of the latest Girls' Angle Bulletin, Volume 18, Number 5, is now available at http://girlsangle.org/page/bulletin.php. For more information, see our blog post https://girlsangle.wordpress.com/2025/6/30/girls-angle-bulletin-volume-18-number-5/

05/22/2025

Congratulations to all participants in our first Math Collaboration at Newton Country Day School...an impressive display of problem solving!