Author Archives: Scott Baldridge

About Scott Baldridge

Distinguished Professor of Mathematics, LSU. Geometric topologist: gauge theory, exotic 4-manifolds, knot theory. Author: Elementary Mathematics for Teachers.

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

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More Good News: Middle School Students’ Scores Jump with Eureka Math

Students at a group of six New York city schools show significant improvement after the introduction of Eureka Math. Continue reading

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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

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Why should a parallelogram also be a trapezoid? The answer may surprise you.

Find out the real reasons why parallelograms should also be considered trapezoids. Continue reading

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MSU is Tearing Down Obstacles to Science and Engineering Degrees

Michigan State University is leading the country in improving its beginning math courses for STEM and non-STEM majors. Go Spartans! Continue reading

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A little self-love? Blah…

On the big list of things to do, making a biography of myself is at the very bottom of the priority list.  It’s one of those things you eventually get roped into doing for other reasons.  I’ve finally created a short … Continue reading

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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

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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

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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

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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

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A Portrait of an Inspiring Teacher: Fred Reusch

Teachers: If you were asked to leave your profession to be an administrator or even to write a history-making curriculum, would you? Read about an awe-inspiring teacher and his decision. Continue reading

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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

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Can an atom have two nuclei? An inquisitive child wants to know!

My 7-year-old daughter, Autumn, recently asked, “Can an atom have two cores (two nuclei)?” Wait, everyone knows that an atom can have only one nucleus. What a silly question. Or is it? Continue reading

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The Washington Post: Many parents hated Common Core math at first, before figuring it out

Parents did not understand at first, but now they appreciate Eureka Math. Read the article by Jay Mathews. Continue reading

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Mathematician Clayton Shonkwiler: An Advanced Perspective

In this episode, Clayton Shonkwiler discusses random polygons at a graduate level, including why roughly 84% of all triangles are obtuse. Continue reading

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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

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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

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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

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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

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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

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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

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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

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Something fun: What it is like to be the son of Captain Derivative

Something Fun: Extra, Extra! Captain Derivative does polynomial interpolation, connects long lost data points together again. Continue reading

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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

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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

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Powers of 2

In this video, 6-year-old Autumn explains the meaning of “2 to the power of 4.” Continue reading

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An article on how Eureka Math began.

A nice article by Leigh Guidry on the creation of @Eureka_Math and how the math curriculum has helped raised student test results in Rapides Parish, Louisiana. Continue reading

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Electric Girls: Shaping Role Models in Technology

Girls soldering, drilling, building circuits? Why, of course! Duh. Continue reading

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The Secrets of my Teaching Success: James Tanton

I recently asked James Tanton, “What are some of the secrets for your success as a teacher?” Here’s what he said. Continue reading

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Something fun: Have you ever used a ruler to measure a Snafoose?

Have you ever tried to measure a Snafoose while riding a goose? Continue reading

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