
Place Value in Primary Sources OER Activity
Cynthia Huffman Ph.D.
An activity for student to examine the use of placevalue in the HinduArabic numeration system from a historical viewpoint by looking at primary sources. Includes the key.
(Revised May 2021)

Ada Byron Lovelace Activity
Cynthia J. Huffman Ph.D.
This activity was originally created for a Women in Mathematics course to provide students with a small taste of some basic mathematics connected to the work of Lady Ada Byron Lovelace. The activity is based on her work related to the Difference Engine of Charles Babbage, and has students investigate differences of sequences. The activity could also be used in other courses, such as a general education mathematics course, a course for preservice elementary teachers, or a history of mathematics course.

CGI (Computer Generated Imagery) Matrix Multiplication Activity
Cynthia J. Huffman Ph.D.
Many students are motivated by real world applications of mathematics, and most students are familiar with the term CGI from watching movies and playing video games. This particular activity ties matrix multiplication to CGI (Computer Generated Imagery). It has been used successfully with high school students in an Algebra II course who had just learned how to do matrix multiplication, middle school and high school students (some of whom were seeing matrix multiplication for the first time) attending a special Math Day on a university campus, and with College Algebra students (during a unit about matrices).

Constructing a Square an Ancient Indian Way Activity
Cynthia J. Huffman Ph.D.
In this activity students use string to model one of the ways that was used in ancient India for constructing a square. The construction was used in building a temporary fire altar. The activity is based on a translation by Sen and Bag of the Baudhāyanaśulbasūtra.

Constructing a Square Indian Fire Altar Activity
Cynthia J. Huffman Ph.D.
In this activity, we will model constructing a square fire altar with a method similar to one used by people in ancient India. The fire altars, which were made of bricks, had various shapes. Instructions for building the altars were in Vedic texts called Śulbasūtras. We will follow instructions for constructing a square gārhapatya fire altar from the Baudhāyanaśulbasūtra, which was written during the Middle Vedic period, about 800500 BC.

Emilie du Chatelet Activity
Cynthia J. Huffman Ph.D.
This activity was originally created for a Women in Mathematics course to provide students with a small taste of some basic mathematics connected to work of Émilie du Châtelet. The activity has the students use some algebra to look at rates of change (velocity and acceleration) of a paraboloid apparatus. It could also be used in other courses, such as history of math, high school or college algebra, and calculus.

Emmy Noether and Modular Arithmetic Activity
Cynthia J. Huffman Ph.D.
This activity was originally created for a Women in Mathematics course to provide students, who may not have had an abstract algebra class, with a small taste of some basic mathematics connected to the work of Emmy Noether. The activity has the students perform some basic modular (clock) arithmetic and then investigate real world applications of modular arithmetic to ISBN and UPC codes. It could also be used in other courses, such as a general education mathematics course.

Euler Construction Activity
Cynthia J. Huffman Ph.D.
Original sources of mathematics provide many opportunities for students to both do mathematics and to improve their problem solving skills. It is also interesting to explore original sources in new ways with the use of technology. In this activity, students can gain experience with dynamic geometry software and enhance their geometric intuition by working through a construction given by Euler in 1783.

Ingrid Daubechies Wavelet Activity (Function Transformations)
Cynthia J. Huffman Ph.D.
This activity was originally created for a Women in Mathematics course to provide the students with a small taste of some basic mathematics connected to the work of Ingrid Daubechies on wavelets. The activity could also be used in a high school algebra or college algebra course to motivate transformations of functions, in particular, translation (shifting) and scaling. The functions used are a basic quadratic x^{2}, the exponential function e^{x} , and the sine function, but other functions could be used to fit the level of the students.

Maria Agnesi Activity
Cynthia J. Huffman Ph.D.
This activity was originally created for a Women in Mathematics course to provide students with a small taste of some basic mathematics connected to the work of Maria Agnesi. The activity has the students look at some of her work in algebra and calculus (optional). It could also be used in other courses, such as history of math, a general education mathematics course, high school or college algebra, and calculus.

Maryam Mirzakhani Riemann Surface Activity
Cynthia J. Huffman Ph.D.
This activity was originally created for a Women in Mathematics course to provide students (who may not yet have taken much upper level mathematics) with a small taste of some basic mathematics connected to the work of Maryam Mirzakhani. In this activity, students investigate some Riemann surfaces and one nonexample. The activity could also be used in other courses, such as a general education mathematics course, a course for preservice elementary teachers, or a history of mathematics course.

OER Women in Math course
Cynthia J. Huffman Ph.D.
This Women in Math course takes a look at 11 notable women mathematicians through readings, quizzes, discussion boards, and activities related to the mathematical contributions of the women. Several of the activities are original and can be found separately at Pittsburg State University Digital Commons (https://digitalcommons.pittstate.edu/  search by author for Huffman, Cynthia).
Course URL
The OER Women in Math course can be accessed at https://pittstate.instructure.com/courses/1081791 .

Place Value in Primary Sources Activity
Cynthia J. Huffman Ph.D.
An activity for student to examine the use of placevalue in the HinduArabic numeration system from a historical viewpoint by looking at primary sources.

Problem Solving Practice with Problems from Fibonacci's "Liber Abbaci"
Cynthia J. Huffman Ph.D.
In this activity, problem solving skills are practiced using two wellknown problems from Fibonacci's worldchanging book "Liber Abbaci". Students are also asked to reflect on the differences and similarities between their solutions and those of Fibonacci. The two problems are the famous rabbit problem which led to what is now know as the Fibonacci sequence and the 30 birds for 30 denarii problem, which is not as wellknown to the general public.

Sophie Germain Activity
Cynthia J. Huffman Ph.D.
This activity was originally created for a Women in Mathematics course to provide students, who may not have had an abstract algebra class, with a small taste of some basic mathematics connected to the work of Sophie Germain on Fermat’s Last Theorem. The activity has the students find all primes less than 100 using the Sieve of Eratosthenes and then determine which of those are Germain primes. The activity could also be used in other courses, such as a general education mathematics course or a history of mathematics course.

The Game of Ur: An Exercise in Strategic Thinking and Problem Solving and A Fun Math Club Activity
Cynthia J. Huffman Ph.D.
In this Open Educational Resource activity, students learn a little about the history of the Royal Game of Ur, the first board game, and get to practice critical thinking and problem solving by playing the game. Instructions are given along with a template for the game and game pieces and tetrahedral die.

What is the Shape of a traditional Rapanui house on Easter Island? A Multicultural Mathematical Activity Involving Ellipses
Cynthia J. Huffman Ph.D.
The Rapanui people of the island Rapa Nui, also known as Easter Island, at one time had a system of “writing” called Rongorongo. Unfortunately, the ability to read Rongorongo has since been lost. So currently archaeology and oral tradition are the only available sources for information about the early people of the island. Oral tradition states that the houses originally had upside down canoes for their roofs, and thus they are called hare paenga, or in English, boathouses. In the literature, these boathouses are said to be elliptical in shape. In this activity, we will investigate the shape of archaeological remains of foundations of the boathouses to try and determine if they are indeed in the shape of an ellipse.
A collection of Open Educational Resources created by professors at Pittsburg State University.
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