• Probability, Statistics, and Data: A Fresh Approach Using R: Textbook for a calculus based introductory statistics course with a data science emphasis.
• Slides for The Aperiodic Monotile, math club talk.
• Slides for Numbers in Clay, sample History of Math lecture.
• Slides for Standards Based Grading, colloquium at SLU, Jan 26, 2024.
• Slides for Using R: ggplot2 and dplyr, SLU 1818 Statistics Day, Nov 17, 2017.
• Materials for the workshop Learning to Teach Introductory Statistics with R, Sep. 28, 2017 at FTTC.
• Materials for the workshop Using R for introductory statistics.
• Math and the Art of M.C. Escher online textbook.
• Slides from my MathFest 2015 talk about student art from Math and the Art of M.C. Escher
• SLU Math Team: Training material and history.
• Symmetry at the Cathedral - a page dedicated to symmetry groups found at the Cathedral Basilica of St. Louis.
• Here's a sheet of printable aperiodic "hat" monotiles and the R code to make it.

• Slides for a talk about the logarithm of two: log2-mar-2015.pdf.
• X Goes First: Wild Tales of a Tic-Tac-Toe Grandmaster, published in Math Horizons, Vol 21, No. 4, April 2014.
• Slides for a talk about Tic-Tac-Toe: ttt-jan-2014.pdf.
  Pictures of all legal and rational moves, up to symmetry.

Articles for Strange Horizons

Strange Horizons is an online magazine of speculative fiction. I wrote a series of general interest mathematics articles which appeared in the magazine.

• The Fourth Dimension (Sep. 2002)
  (or, try the Portugese translation. Thanks, Marcelo!)
• Folding (Mar. 2002)
• Steganography: How to Send a Secret Message (Oct. 2001)
• The Biggest Numbers in the Universe (Apr. 2001)
• Habitrails and Asteroids: Topology From the Inside (Jan. 2001)

• Math 120: College Algebra
• Math 130: Elementary Statistics with Computers
• Math 1300: Elementary Statistics with Computers
• Math 132: Survey of Calculus
• Math 142: Calculus I
• Math 1520: Calculus II
• Math 1660: Discrete Mathematics
• Math 244: Calculus III
• Math 266: Principles of Mathematics
• Math 320: Numerical Analysis
• Math 355: Differential Equations
• Math 370: Advanced Math For Engineers
• Stat 3850: Foundations of Statistics
• Math 403: Probability and Statistics for Engineers
• Math 4050: History of Mathemaitcs
• Math 451: Complex Analysis I
• Math 452: Complex Analysis II
• Stat 4840: Time Series
• Stat 4880: Bayesian Statistics and Statistical Computing
• Math 593: Graphs and Markov Chains
• Math 641-2: Differential Geometry I-II
• CS 150: Object Oriented Programming
• CS 220: Computer Science II
• EE/CS 305: Microprocessors
• CSCI 3500: Operating Systems
• CSCI 3820: Computer Graphics
• Math 110-111 (U. of Chicago, 1995-6).