# Blog Archives

## You can use pictures to explain column addition!

In this video, Autumn shows how to add two large numbers using column addition (The Addition Algorithm). In the process, she explains how column addition works using pictures. Continue reading

## Tim Nguyen: The Perturbative Approach to Path Integrals

In this video, Tim Nguyen gives an awesome explanation of part of a subject that Richard Feynman once claimed, “If you think you understand quantum mechanics, you don’t understand quantum mechanics.” Continue reading

## Learning Division Facts: Numbers that are Products of Two 1-digit Numbers

In this video, 7-year old Autumn and I show an activity that helps students learn the division facts if they already know the multiplication facts. Continue reading

## Mathematician Pallavi Dani – Divergence in Right-angled Coxeter Groups

LSU mathematician Pallavi Dani talks about using geometry to study problems in algebra and vice versa in her research. Continue reading

## But Honey, You do know the Multiplication Table!

In this video, 7-year-old Autumn proves to herself that she knows the entire multiplication table. Along the way, she summarizes lots of great strategies for learning the facts. Continue reading

## Fraction Multiplication via Skip Counting!

In this video, 7-year-old Autumn shows how to use skip counting to do fraction multiplication and division. Watch as she calculates 7 x 2/3 as well as 4 4/5 ÷ 2/5 in her head! Continue reading

## Clayton Shonkwiler: Research Seminar on Applications of Geometry and Topology to Random Walks

Clayton Shonkwiler gives an advanced seminar on applications of geometry and topology to random walks/polygons and polymer physics. Continue reading

## Growing up with Eureka Live: Mathematical reasons for introducing a different solution method

In this video, 7 year old Autumn answers math questions in front of a live audience! Watch her win everyone’s heart. Continue reading

## Holiday Math Special: In the 12 Days of Christmas song, which of the presents do you get the most?

In this holiday math special video, Autumn asks the question, “In the 12 days of Christmas, which of the presents do you get the most?” Enjoy the singing! Continue reading

## Multiplying by 25

In this video, 7-year-old(!) Autumn shows how easy it is to multiply a number by 25. The accompanying article explains why teaching this method is important for preparing children for Algebra. Continue reading

## Woman Superhero T-Shirt Challenge

Autumn asked, “Why don’t you wear a girl superhero T-shirt for our videos, dad?” And I said, “Why not? Absolutely!” But we need your help… Continue reading

## Mathematician Clayton Shonkwiler talks about Polymer Science

In this episode, we meet Clayton Shonkwiler, a mathematician from Colorado State University, who talks to us about applications of geometry and topology to the study of random polygons and polymer science. Continue reading

## Variables made easy

In this video, 6-year-old Autumn explains that a variable in an expression can be thought of as a “slot” that a number can be inserted into. Watch her do arithmetic with “slots” (i.e., variables)! Continue reading

## Building the ⟨Sci|State⟩ Studio—a weekend in time lapse.

Watch how to build a sound/video stage with green screen and a light board at 15x speed. The studio is for videos like “Geometry and Topology Today.” Continue reading

## Adam Saltz speaks on an annular refinement of the transverse element in Khovanov homology

In this seminar video, Adam Saltz explains a recent result of his on transverse knots. Continue reading

## Testing out the new Green Screen (Plus a bonus 14×16 calculation)

Which background screen should we use for Geometry and Topology Today? Take the poll! Continue reading

## What is the sum 1+2+3+4+…+24+25?

In this video, 6-year-old Autumn shows how she found the sum 1+2+3+4+….+24+25. Continue reading

## Meet Mathematician Jeremy Van Horn-Morris

In this episode we meet mathematician Jeremy Van Horn-Morris, who talks about some geometric and visual tools used to understand questions concerning the motion of particles. Continue reading

## Skip Counting with Fractions

In this “Growing up with Eureka” video, 6-year-old Autumn shows how to skip count by fractions 1/2, 1/3, and 1/5. Continue reading

## Ben McCarty plays “Swing that Hammer”

Listen to mathematician Ben McCarty sing “Swing that Hammer” using a Breedlove guitar. Continue reading

## Subtraction Problems with Kittens

Watch 6 year-old Autumn use Eureka Math methods to subtract two numbers, including 1017-999 in her head. Continue reading

## A big NCTM thanks and next year’s talk

A big thanks to all the people who attended my NCTM talk, and a question: Would you like to see my daughter Autumn do some Eureka Math at next year’s NCTM meeting? Continue reading

## Meet Mathematician Aaron Lauda

What did mathematician Aaron Lauda do when he proved one of his big theorems? Watch and find out! Continue reading

## Interview with Thomas Lam on electrical networks

Today we talk with Thomas Lam, professor of mathematics at the University of Michigan, about electrical networks. Geometry and Topology Today is a “news show” on state-of-the-art mathematics research discussed for a general audience. Continue reading

## Learning to Multiply, Part III

In the grand finale and Part III of a three part series, we put the two skills learned in Part I and Part II together to show an easy way to start to learn the basics of multiplying. Continue reading

## Learning to Multiply, Part II

In this video on learning to multiply, Autumn shows how skip count by 10s, 3s, 5s, and 4s. In the grand finale, Part III, we put the skills learned from Part I and Part II together! Continue reading

## Learning to Multiply, Part I

Intended Audience: Teachers and parents of K-5 students This Growing Up With Eureka video is Part I of a three part series on how to start the process of learning to multiply with your child/students. By “start the process” I mean we … Continue reading

## Line arrangements from an advanced perspective

We continue our conversation with mathematician Moshe Cohen, who now discusses line arrangements from an advanced perspective. Continue reading

## 100th Day of School

On the 100th day of first grade, Autumn asked me if we could do a Growing Up With Eureka based upon the day. Well, yes, of course! Continue reading

## Teaching my 3-year-old to read.

See Autumn learning to read at 3 1/2 years old! (She is now an avid reader at 6.) Continue reading