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Workshops and events

Dates and Times are subject to change.  Check our home page for the most up to date information and to register. For more info, contact: trianglemtc@gmail.com 


Saturday March 14, 3-5 PM. Pi Day!  Chapel Hill Library.   Leader Lee Moavenzadeh.

Saturday April 18, 3-5 PM.  Taxicab Math. Meredith College, Raleigh.  Led by Julie Kolb.


Full Day Workshop at NCSU Saturday, Feb 1st, 2020

  • More information here: visible-math-at-ncsu-febuary-1-2019-2
  • Where: SAS Hall, NCSU
  • When: Saturday, February 1, 9:30-3:30
  • Who: Math Teachers of all kinds: K-12, public, charter, private, homeschool, preservice, retired, as well as math and math education students, parents
  • What: Two sessions:
    • “The Watermelon Problem – Slicing and Dicing with Lines and Planes” with Linda Green, Department of Math at UNC, Chapel Hill.
    • “Imaging: the science (and mathematics) of seeing what is invisible to others” with  Arvind Saibaba, Department of Math, NCSU
  • Schedule:
    • 9:30 -10:00  registrations, snacks
    • 10:00-12:15 first workshop (Linda) SAS 2102
    • 12:15-1:15 lunch break  SAS 4104 (we will provide lunch)
    • 1:15 – 3:30 second workshop (Arvind) SAS 2102

Saturday January 11, 3-5 PM.  Art+Math. At the Nasher Art Museum in Durham.  Leader Kim Johnson

Saturday, November 16, 3-5 PM. Mathematical Magic.  Led by Tom Keeler at the Chapel Hill Library.

October 12, 3-5 PM. Zombies and Mazes!   Location Tractor’s Corn Maze, Wake Forest.  Led by Kim Johnson.

October 5th-6th, 2019, 130th Anniversary, Math Department, NCSU.

September 13-14, Central Park School for Children, Durham. “Why not 10,000 math facts?” with Eric O’Brien.

Workshop Program

Playlist of videos inspired by Eric O’Brien’s lessons.

May 4, 10-12, SAS Hall 2102, NCSU.  “Medical Imaging and other real life uses for mathematics” with Dr. Arvind Krishna Saibaba.

From ultrasound scanners used before birth to environmental sensors that monitor the pathways of harmful substances, imaging technologies play an important role in human lives. In this workshop, I will explain some of the mathematical ideas behind image reconstructions: how they work, what their limitations are, and what uncertainties are associated with interpreting the images generated by imaging technologies.

Bio: Arvind K. Saibaba is an assistant Professor of Mathematics at NC State since 2015. His research interests including inverse problems, numerical linear algebra, and uncertainty quantification. His work is interdisciplinary and he collaborates with scientists in areas such as medical imaging, groundwater hydrology, and atmospheric science. When not working on mathematics, he enjoys hiking and music.

March 16, 10-12, Chapel Hill Library.  “The Turing Tumble”, with Tom Keeler.

We looked at the hottest Kickstarter project of 2017, the Turing Tumble. This game, played with marbles and ramps, allows students to see the inner workings of a computer down to the math underneath the electronics. We learned to count, to hold data, and to use and and or gates. Here is a video explaining the concept.

February 16, 10-12, Hunt Library, NCSU.  “The Very Large (but not infinite) Library” with Dr. Kim Johnson

We looked at the story “The Library of Babel” by Jorge Luis Borges. We explore the intersection between imagination and computation to understand his amazing story and other stories. Here is a link to the story: https://libraryofbabel.info/libraryofbabel.html.

January 19, 10-12, Earth Fare, Brierdale shopping center, Raleigh. “The Watermelon Problem: Slicing and dicing with lines and planes” with Dr. Linda Green

November 10, 10-12, Chapel Hill Library “Mathematical Folding” with Dr. Jack Snoeyink.

A triangle is rigid but a rectangle can be squashed into a rhombus.
Structural rigidity explains why by counting degrees of freedom to predict the rigidity or flexibility of networks of fixed-length bars connected by universal joints. We will see that the mathematical study of rigidity can be appreciated at many levels: from the fun of playing with moving shapes, through the satisfaction of proving the carpenters’ ruler theorem, to the puzzlement of conjectures that remain open.

Prof. Jack Snoeyink (Ph.D. Stanford, 1990) works on computational geometry, which is a branch of the theory of computer science that designs and analyzes algorithms and data structures for problems best stated in geometry form.  His main application areas are in terrain modeling in geographic information systems, molecular structure validation and improvement in biochemistry, as well as computational topology, computer graphics, and information visualization.  He spent 2015-2017 in the swamp, as a program director at the US National Science Foundation, and is glad to be back to his office full of puzzles, and to teaching courses like Algorithms & Analysis and Folding: from paper to proteins.

October 13, 10-12, NC Art Museum lobby, “Math Trek: The Dot and the Line”, by Natural Math

Dr. Maria Droujkova is a parent, curriculum developer, and mathematics education consultant. Maria brings together leaders in mathematics education, researchers, developers, parents, and teachers for projects and discussions of family mathematics, early algebra, individualized instruction, math games, and math clubs.

For more information about Natural Math, click here.

Maria mentioned the book, The Dot and the Line, by Norton Juster.  A cartoon of the book is here.

Saturday, September 29th 10-12, Chapel Hill Library Mark McCombs, Origami and Mathematics

Mark has been teaching at the University of North Carolina at Chapel Hill for nearly 30 years. He has led students in origami at the Julia Robinson math festival as well as leading teachers at conferences. Resources from the workshop are available here

Saturday April 14, 10-12, Topics We Love and Topics We Hate to Teach, Dr. Irina Kogan

Saturday March 17, 10 am-12. Mathematics of Set

Martha Bizzell and Dr. Kim Johnson, Chapel Hill Library.   Materials: click here.  Photos: click here.

Mini-intensive workshop on Saturday Feb. 10:

For photos of the workshop, click here.

9:30  – 3:30 in SAS Hall, Room 2102,  on the NCSU campus.  Featured presenters: Natasha Rozhkovskaya (more info, click here) topic: Combinatorics  and probability of dice“Everyone played  games of chance  involving  dice throwing, but not everyone knows that not all  dice are equal.  Dice are an amazing mathematical object with  simple but remarkable  properties.  At the workshop we will look into  curious dice-related  math  and  basic probability questions”

and Hector Rosario – Conjecture and Proof: Nurturing Creativity in the K-12 Classroom In this workshop we will share guidelines for introducing the elements of conjecture and proof in the regular classroom, as well as problems and activities that naturally blend into traditional curricula, yet exposes learners to the joy of doing mathematics.

Tuesday January 23rd, 2018, 5:30-7:30, Creative Problem Solving, Dr. Jere Confrey.

407 Gorman St. Raleigh  More info about Dr. Confrey, click here.  Please register if you plan to come.  All who register in advance and attend the workshop will be entered in a drawing for interesting prizes.  To register, click here.

11/20/17 Candy Cane Algebra Dr. Kim Johnson

9/19/2017 Soma Cube for spatial intelligence.

Omnifix cubes to model math concepts from odd/even to the sum of first n integers.  (Soma cube presentation, click here.)

10/21/2017 Develop Understanding with Manipulatives Ryan Dougherty.

Working with materials to model matrix style multiplication, from 2×2 digit multiplication to binomial multiplication

05/06/2017 Math Wrangles Boyd Blackburn 

(for more info on math wrangles, click here)

03/04/2017 Spot it! with Kim Johnson –

Analyzing the math involved in the game Spot It! (for more info, click here.)

04/01/2017 Geometry Robot with Dr. Irina Kogan, NCSU

02/04/2017 Immersion workshop: Chamelion Cubes  Dr. Tatiana Shubin, Dr. Harold Reiter

12/03/2016 Intersection Math with Kim Johnson

10/29/2016 Problem-Solving Strategies in Practice with Dr. Hector Rosario

10/7/2016 Organization meeting lead by Hector Rosario

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