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- Harvey Mudd College Undergraduate Math Forum, Optimal Leapfrogging, Fall 1989.
- Stanford University Operations Research Colloquium, Graphs, Maneuvers and Turnpikes, Fall 1989.
- Santa Clara University Mathematics Colloquium, Optimal Leapfrogging, Fall 1989.
- Southern California Section MAA Meeting, Optimal Leapfrogging, Spring 1990.
- Claremont Colleges Math Colloquium, Graphs, Maneuvers and Turnpikes, Spring 1990.
- Harvey Mudd College Stauffer Series, Graphs, Maneuvers and Turnpikes, Summer 1990.
- Harvey Mudd College Undergraduate Math Forum, The Bisection Method: Which Root? Fall 1990.
- ORSA National Meeting, Las Vegas, NV, Improved Methods for Finding Negative Cycles in a Graph, Summer 1991.
- Trinity University Mathematics Seminar, Odd Numbers in Pascal’s Triangle, Spring 1992.
- Claremont Colleges Math Colloquium, How to Win at Poker, Spring 1992.
- ORSA National Meeting, San Francisco, CA, How to Win at Poker, Fall 1992.
- Harvey Mudd College Undergraduate Math Forum, The Birthday Inequality, Fall 1992.
- ORSA National Meeting, Anaheim, CA, Sensible Rules for Remembering Duals, Spring 1993.
- Claremont Combinatorics Colloquium, Generatingfunctionology in Action (3 parts), Spring 1993.
- Harvey Mudd College Stauffer Series, The S-O-B Method, Summer 1993.
- Caltech Combinatorics Seminar, How Do I Marry Thee? Let Me Count the Ways!, Fall 1993.
- Carleton College Math Colloquium, How Do I Marry Thee? Let Me Count the Ways!, Fall 1993.
- St. Olaf College Math Colloquium, How Do I Marry Thee? Let Me Count the Ways!, Fall 1993.
- Claremont Colleges Math Colloquium, How Do I Marry Thee? Let Me Count the Ways!, Spring 1994.
- Claremont Combinatorics Colloquium, Combinatorics and Campus Security, Spring 1994.
- SIAM Symposium on Discrete Mathematics, Albuquerque, NM, How Do I Marry Thee? Let Me Count the Ways!, Summer 1994.
- Harvey Mudd College Stauffer Series, How Do I Marry Thee? Let Me Count the Ways!, Summer 1994.
- International Mathematical Programming Society International Symposium on Mathematical Programming, Ann Arbor, MI, Introduction to Duality: The S-O-B Method,(invited session organizer), Summer 1994.
- Harvey Mudd College Undergraduate Math Forum, Backwards Induction: The Arithmetic-Geometric Mean Inequality, Fall 1994.
- Harvey Mudd College Stauffer Series, The Tenure Game, Spring 1995.
- Southern California Section MAA Meeting, Mathematical Magic with Fibonacci Numbers, Spring 1995.
- Caltech Combinatorics Seminar, Combinatorics and Campus Security, Fall 1995.
- The Fourth Los Angeles Conference on Magic History, The Lives and Methods of Lightning Calculators, Fall 1995.
- Harvey Mudd College Undergraduate Math Forum, Combinatorics and Campus Security, Fall 1995.
- Joint Meetings of the AMS/MAA/SIAM, Orlando, FL, Determinants of the Tournaments, Spring 1996.
- Southeastern Conference on Combinatorics and Graph Theory, Baton Rouge, LA, Strong Chromatic Indices of Subset Graphs, Fall 1996.
- Santa Clara University Mathematics Colloquium, Odd Numbers in Pascal’s Triangle , Spring 1996.
- Pacific Northwest Section of the MAA, Portland, OR, Mathematical Magic with Fibonacci Numbers, Spring 1996.
- Claremont Colleges Math Colloquium, The Probabilistic Method, Spring 1996.
- The Skeptics Society, Caltech, Pasadena, CA, The Lives and Methods of Lightning Calculators, Summer 1996.
- Harvey Mudd College Undergraduate Math Forum, Binomial Coefficients Mod p, Spring 1997.
- Claremont Combinatorics Colloquium, Paths to a Multinomial Inequality, Spring 1997.
- Harvey Mudd College Stauffer Series, Binomial Coefficients Mod p, Spring 1997
- ORSA National Meeting, Harvey Mudd College Mathematics Clinic, San Diego, CA, Summer 1997.
- Southern California Section MAA Meeting, Magic “Squares” Indeed!, Fall 1997,
- Harvey Mudd College Undergraduate Math Forum, Determinants of the Tournaments, Fall 1997.
- Claremont Colleges Math Colloquium, Magic “Squares” Indeed!, Spring 1998.
- Johns Hopkins University, “Goldmanfest”, The Best Way to Knock ’em Down, Spring 1999.
- University of Arizona Math Colloquium, Recounting Fibonacci Numbers and Continued Fractions, Spring 1999.
- Claremont Combinatorics Colloquium, The Mathematics of Cootie, Spring 1999.
- Claremont Combinatorics Colloquium, Recounting Fibonacci Numbers and Continued Fractions, Spring 1999.
- Michigan Section of the MAA, Ypsilanti, MI, Recounting Fibonacci Numbers and Continued Fractions, Summer 1999.
- Kalamazoo Area Math and Science Center, Kalamazoo, MI, The Best Way to Knock ’em Down, Summer 1999.
- Southern California Section MAA Meeting, Magical Moments in Teaching, Fall 1999.
- George Mason University, Operations Research Colloquium, The Best Way to Knock ’em Down, Fall 1999.
- Claremont Combinatorics Colloquium, The Best Way to Knock ’em Down, Fall 1999.
- Humoldt State Universty, Harry S. Kieval Semi-Annual Lecture in Mathematics, The Art of Mental Calculation, Fall 1999.
- Humboldt State University Mathematics Colloquium, The Best Way to Knock ’em Down, Fall 1999.
- Eastern Pennsylvania-Delaware Section of the MAA, Recounting Fibonacci Numbers and Continued Fractions, Fall 1999.
- Joint Meetings of the AMS/MAA/SIAM, Washington DC, Magical Moments in Teaching, (acceptance speech for Haimo Prize for outstanding teaching), January 21, 2000.
- Carnegie-Mellon University, Theoretical Computer Science Colloquium, The Best Way to Knock ’em Down, February 18, 2000.
- Cal Poly Mathematics Colloquium, San Luis Obispo CA, The Best Way to Knock ’em Down, May 11, 2000.
- CSUN Mathematics Colloquium, Northridge CA, The Best Way to Knock ’em Down, May 12, 2000.
- Tenth SIAM Conference on Discrete Mathematics, Minneapolis MN, Recounting Fibonacci Numbers and Continued Fractions, June 13, 2000.
- The Magic Castle, Hollywood CA, The Art of Mathematical Magic, July 9, 2000.
- MSRI Workshop on Combinatorial Games, Berkeley CA, Le Her, July 26, 2000.
- MAA MathFest 2000, UCLA, Los Angeles CA, (Project NEXT Panel discussion ), Balancing Personal Life with Professional Life August 2, 2000.
- MAA MathFest 2000, UCLA, Los Angeles CA, (Master of Ceremonies for Opening Banquet) Mathematical Constance, August 2, 2000.
- Claremont Combinatorics Colloquium, Composite Fermions and Integer Partitions, Fall 2000.
- Southern California Section MAA Meeting, “Who Wants to be a Mathematician?” (game show with Ernie Solheid) Fall 2000.
- Oberlin College, Oberlin OH, Recounting Fibonacci Numbers and Continued Fractions, November 9, 2000.
- Case Western Reserve University, Cleveland OH, Recounting Fibonacci Numbers and Continued Fractions, November 10, 2000.
- University of Nevada, Las Vegas NV, Recounting Fibonacci Numbers and Continued Fractions, November 30, 2000.
- Caltech Combinatorics Seminar, Pasadena CA, Composite Fermions and Integer Partitions, December 7, 2000.
- Western Number Theory Conference, University of San Diego, San Diego CA, Recounting Fibonacci Numbers and Continued Fractions, December 20, 2000.
- Carnegie Mellon University Mathematics Colloquium, Proofs that Really Count!, January 26, 2001.
- Ohio Section of MAA, Bowling Green State University, Proofs that Really Count!, , March 23, 2001.
- Intermountain Section of MAA, Ricks College, Idaho, Proofs that Really Count!, April 6, 2001.
- Claremont Colleges Math Colloquium, Counting on Harmonic Numbers, Fall 2001.
- Bay Area Mathematical Adventures, San Jose, CA, Proofs that Really Count!, October 5, 2001.
- Southern California Section MAA Meeting, Counting on Harmonic Numbers, Fall 2001.
- Moravian College Student Math Conference (keynote speaker), Proofs that Really Count!, February 23, 2002.
- Southern California Section MAA Meeting, Combinatorics of Hyperharmonic Numbers, Spring 2002.
- University of Colorado, Boulder, Math Colloquium, Proofs that Really Count!, March 18, 2002.
- California State University, Fresno, Math Colloquium, Proofs that Really Count!, March 20, 2002.
- UC Irvine Mathematics Colloquium, The Best Way to Knock ’em Down, May 30, 2002.
- 10th International Conference on Fibonacci Numbers and their Applications, Flagstaff, AZ, Fibinomial Identities, June 28, 2002.
- SIAM Conference Discrete Mathematics , San Diego, CA, Combinatorics of Hyperharmonic Numbers, August 11, 2002.
- Claremont Colleges Math Colloquium, The “Power” of Fibonacci Numbers with Combinatorics, January 22, 2003.
- Michigan Undergraduate Math Council (keynote speaker), Proofs that Really Count, February 15, 2003.
- HMC Parents Day Reception, Fun with Fibonacci Numbers, May 10, 2003.
- Harvey Mudd College Stauffer Series, Proofs that Really Count, July 3, 2003.
- MAA MathFest, Boulder, CO, (keynote speaker, with J.J. Quinn), Proofs that Really Count, August 1, 2003.
- Carnegie Mellon University (convocation speaker, Mellon College of Science), The Science of Patterns, August 21, 2003.
- Carleton College, Mathematics Colloquium, Proofs that Really Count, September 25, 2003.
- Macalester College, Discrete Mathematics Colloquium, Proofs that Really Count, September 26, 2003.
- Cal Poly, Pomona, Mathematics Colloquium, The Best Way to Knock ’em Down, October 2, 2003.
- Southern California Section MAA Meeting, Counting on Determinants, October 4, 2003.
- Rose-Hulman Institute of Technology, Math Colloquium, The Best Way to Knock ’em Down, October 9, 2003.
- Claremont Statistics Colloquium, The Best Way to Knock ’em Down, November 4, 2003.
- Cal State Long Beach, Counting on Determinants, March 5, 2004.
- Cal State Dominguez Hills, Counting on Determinants, March 17, 2004.
- Gathering for Gardner 6, Counting on Fibonacci Numbers, Atlanta, GA March 25, 2004.
- MAA Southeastern Section, Clarksville, TN, Proofs that Really Count, March 27, 2004.
- Claremont Combinatorics Seminar, Counting the Sums of Cubes of Fibonacci Numbers, April 23, 2004.
- Cal Poly San Luis Obispo, Counting on Determinants, May 7, 2004.
- HMC PDO program (visiting high school teachers), Counting on Fibonacci Numbers, June 13, 2004.
- International Fibonacci Conference, Braunschweig, Germany, Counting the Sums of Cubes of Fibonacci Numbers, July 7, 2004.
- International Fibonacci Conference, Braunschweig, Germany, When does F_m^L divide F_n? A Combinatorial Solution, July 9, 2004.
- Hampshire College Summer Studies in Mathematics, Counting on Fibonacci, August 7, 2004.
- Project NExT, Discrete Mathematics, Providence, RI, August 10, 2004.
- MAA MathFest, Providence, RI, Counting on Determinants, August 12, 2004.
- Olin College, The Science of Patterns, September 7, 2004.
- Washington and Lee U, Proofs that Really Count, September 20, 2004.
- Brandeis Combinatorics Colloquium, Counting the Sums of Cubes of Fibonacci Numbers, September 23, 2004.
- Bryn Mawr/Haverford Math Colloquium, Counting on Determinants, September 27, 2004.
- Swarthmore College, Counting on Determinants, September 28, 2004.
- Rutgers U, Experimental Math Seminar, Counting the Sums of Cubes of Fibonacci Numbers, October 7, 2004.
- Rutgers U Math Colloquium, Counting on Determinants, October 8, 2004.
- MAA Southern California-Nevada Section, The Best Way to Knock ’em Down, Las Vegas, NV, October 9, 2004.
- Carnegie Mellon U, Undergraduate Math Colloquium, Proofs that Really Count, October 14, 2004.
- Johns Hopkins U, Applied Mathematics and Statistics Colloquium, Counting on Determinants, October 21, 2004.
- University of Maine Math Colloquium, Proofs that Really Count, November 4, 2004.
- Mount Holyoke Math Club, The Best Way to Knock ’em Down, November 10, 2004.
- Mount Holyoke Math Seminar, Combinatorics and Number Theory, November 11, 2004.
- Boston University, Math Masters Lecture, Proofs that Really Count, November 16, 2004.
- MAA Northeastern Section, WPI, Counting on Determinants, November 20, 2004.
- Brandeis Math Colloquium, Counting on Determinants, November 22, 2004.
- Wellesley College, The Best Way to Knock ’em Down, December 1, 2004.
- Brandeis Combinatorics Colloquium, Vandermonde’s Determinant and Fibonacci SAWs December 2, 2004.
- Stonehill College, The Best Way to Knock ’em Down, December 8, 2004.
- Weston High School, Counting on Fibonacci Numbers, December 9, 2004.
- MIT Combinatorics Seminar, Vandermonde’s Determinant and Fibonacci SAWs, December 10, 2004.
- University of Sydney, Australia, Counting on Determinants, 18 March, 2005.
- Macquarie University, Sydney, Australia, Maths Colloquium, Counting on Determinants, 21 March, 2005.
- Macquarie University, Sydney, Australia, Number Theory Seminar, Combinatorics and Number Theory, 21 March, 2005.
- University of South Australia, Adelaide, Applied Mathematics Seminar, The Best Way to Knock ’em Down, 28 April, 2005.
- University of New South Wales, Sydney, Australia, Maths Seminar, Combinatorics and Number Theory, 17 May, 2005.
- Sydney University Maths Society, The Best Way to Knock ’em Down, 18 May, 2005.
- University of Queensland, Brisbane, Australia, Counting on Determinants, 8 July, 2005.
- Pomona College, Claremont Colleges REU, Counting on Undegraduate Research, July 14, 2005.
- Harvey Mudd College, Math, Magic & The Da Vinci Code, July 29, 2005.
- Project NExT keynote address, Albuquerque, NM, Magical Moments in Teaching and Undergraduate Research, August 1, 2005.
- MAA MathFest, Albuquerque, NM (short course lecture), Magic Square Magic, August 2, 2005.
- MAA MathFest, Albuquerque, NM, Math Horizons (with Jennifer Quinn), August 4, 2005.
- MAA MathFest, Albuquerque, NM, Gems of Number Theory (Invited session co-organized with Ezra Brown), August 5, 2005.
- Pi Mu Epsilon J. Sutherland Frame Lecture, MAA MathFest, Albuquerque, NM, Proofs That Really Count: The Art of Combinatorial Proof , August 5, 2005.
- Claremont Colleges Math Colloquium, A Combinatorial Proof of Vandermonde’s Determinant (and Other Sabbatical Adventures), September 21, 2005.
- Claremont Combinatorics Colloquium, Self-Avoiding Walks and Fibonacci Numbers, September 28, 2005.
- Wisconsin Section NExT, Menemonie, WI, Magical Moments in Undergraduate Research, September 30, 2005.
- Wisconsin Section NExT, Menemonie, WI, Proofs That Really Count , September 30, 2005.
- Wisconsin Section NExT, Menemonie, WI, Magical Moments in Teaching, October 1, 2005.
- MAA Southern California-Nevada Section Meeting, A Combinatorial Proof of Vandermonde’s Determinant, October 8, 2005.
- Claremont Combinatorics Colloquium, Pythagorean Primes and Palindromic Continued Fractions, October 12, 2005.
- James Madison University, Undergraduate Mathematics Research Conference (keynote speaker), Proofs That Really Count , November 12, 2005.
- California State University Northridge Math Club, Proofs That Really Count, November 18, 2005.
- University of Wisconsin, Madison, Brown Bag Seminar A Combinatorial Proof of Vandermonde’s Determinant, December 2, 2005.
- Bay Area Math Olympiad Awards Ceremony, MSRI, Proofs That Really Count, March 12, 2006.
- Wake Forest University (Gentry Lectures), Proofs That Really Count, March 30, 2006.
- Wake Forest University (Gentry Lectures), Counting on Determinants, March 30, 2006.
- Kentucky Section of MAA, Centre College, Proofs That Really Count, March 31, 2006.
- Northern Arizona University, Proofs That Really Count, April 1, 2006.
- Northern Arizona University, Counting on Determimnants, April 6, 2006.
- Oberlin College, Counting on Determimnants, April 28, 2006.
- Metropolitan New York Section of MAA, Dowling College, Counting on Determimnants, May 7, 2006.
- Hollywood Math Club, Proofs That Really Count, May 21, 2006.
- HMC Stauffer Lecture Series, Counting on Determimnants, June 13, 2006.
- Claremont Colleges REU, Counting on Determimnants, June 15, 2006.
- 12th International Conference on Fibonacci Numbers and their Applications, San Francisco, Self-Avoiding Walks and Fibonacci Numbers, July 17, 2006.
- 12th International Conference on Fibonacci Numbers and their Applications, San Francisco, The Lucas Triangle Recounted, July 19, 2006.
- Young Mathematicians Conference (Keynote Speaker), Ohio State U., Proofs That Really Count, August 5, 2006.
- Joint Meetings of the AMS/MAA, New Orleans, LA, An Amazing Mathematical Card Trick, January 5, 2007.
- Claremont Mathematics Colloquium, Alternating Sums: An Alternative View , February 28, 2007.
- Louisiana-Mississippi Section of MAA, Mississippi State University, Proofs That Really Count , March 2, 2007.
- Indiana Section of MAA, University of Indianapolis, Proofs That Really Count , March 23, 2007.
- Nebraska – SE South Dakota Section of MAA, Dakota State University, Proofs That Really Count , March 30, 2007.
- HMC Alumni College, Claremont, CA, Alternating Sums: An Alternative View , April 28, 2007.
- UCLA Graduate Seminar, How to Find a Job (at a Good Liberal Arts College) , May 31, 2007.
- 6th International Conference on Lattice Path Combinatorics and Applications, Eastern Tennessee State University, Counting on Chebyshev Polynomials , July 13, 2007.
- Claremont Colleges REU, Counting on Chebyshev Polynomials , July 24, 2007.
- Project NEXT, MathFest, Project Next, San Jose State University, Discrete Math , August 2, 2007.
- Southern California Section MAA Meeting, Santa Ana College, Combinatorial Trigonometry, October 13, 2007.
- Claremont Combinatorics Colloquium, Combinatorial Trigonometry, December 4, 2007.
- National Institute of Standards and Technology (NIST), Gaithersburg, MD, Combinatorial Trigonometry (and a Method to DIE for), January 11, 2008.
- MAA Carriage House Lecture Series, Washington DC, Combinatorial Trigonometry (and a Method to DIE for), January 12, 2008.
- Bay Area Mathematics Association, Santa Clara University, Combinatorial Trigonometry, January 16, 2008.
- California State University, Los Angeles, Combinatorial Trigonometry, January 30, 2008.
- University of Tennessee, Knoxville, Combinatorial Trigonometry, February 29, 2008.
- Gathering for Gardner 8, Atlanta, GA, An Amazing Mathematical Card Trick March 29, 2008
- Allegheny Mountain Section of the MAA, University of Pittsburgh, Combinatorial Trigonometry, April 11, 2008.
- New Jersey Section of the MAA, William Patterson University, Combinatorial Trigonometry, April 12, 2008.
- Wisconisin Section of the MAA, Madison Area Technical College, Combinatorial Trigonometry, April 12, 2008.
- Harvey Mudd College, Mathematical Card Tricks, April 29, 2008.
- Kalamazoo College Mathematics Colloquium, Combinatorial Trigonometry, May 8, 2008.
- Dalhousie University Mathematics Colloquium, Halifax, Nova Scotia, Combinatorial Trigonometry, May 12, 2008.
- MAA Mathfest, Madison, Wisconsin, Biscuits of Number Theory, August 2, 2008.
- Caltech Math Club, Mathematical Card Tricks, October 21, 2008.
- TED, Palm Springs, CA, Down With Calculus, February 5, 2009
- Denison University (Gordon Lecture Series), Mathematical Card Tricks, February 12, 2009
- Denison University, Zero Sum Games, February 13, 2009
- Denison University (Gordon Lecture Series), Pascal’s Triangle, February 13, 2009
- Denison University (Gordon Lecture Series), Combinatorial Trigonometry, February 13, 2009
- Roanoke College, The Best Way to Knock ’em Down, March 16, 2009
- Roanoke College, The Birth of Graph Theory, March 16, 2009
- Roanoke College, The Magic of Discrete Mathematics, March 16, 2009
- Roanoke College, Matrices and Markov Chains, March 17, 2009
- Roanoke College, Tournaments and King Chickens, March 17, 2009
- Roanoke College, Social Networks, March 18, 2009
- Roanoke College, Mathematical Card Tricks, March 18, 2009
- Roanoke College, Trees and Data Structures, March 18, 2009
- Roanoke College, Planar Graphs, March 18, 2009
- Roanoke College, Map Coloring, March 19, 2009
- Roanoke College, Algorithms and Complexity March 19, 2009
- Roanoke College, The Twelvefold Way of Combinatorics, March 19, 2009
- Eastern Michigan University, Magic with Numbers: Undergraduate Research in Mathematics, March 27, 2009
- Eastern Michigan University, Combinatorial Trigonometry, March 27, 2009
- Brigham Young University, The Best Way to Knock ’em Down, April 1, 2009
- Texas Section of MAA, University of North Texas, Combinatorial Trigonometry, April 18, 2009
- USAMO Awards Ceremony, Washington, DC, Combinatorial Trigonometry, June 8, 2009
- MAA MathFest Minicourse, Portland, OR, Thinking Combinatorially, August 6-8, 2009
- National Academy of Sciences, Distinctive Voices, Irvine, CA, The Art of Mental Calculation September 30, 2009
- Penn State Conference on Undergraduate Research in Math, Combinatorial Trigonometry, November 21, 2009
- Youngstown State University, Combinatorial Trigonometry, February 12, 2010
- California Polytechnic University, Pomona, Combinatorial Trigonometry, February 26, 2010
- Trinity University, San Antonio, TX, Combinatorial Trigonometry, March 4, 2010
- Southwest Undergraduate Mathematics Research Conference, El Paso, TX Combinatorial Trigonometry, March 5, 2010
- Claremont Combinatorics Colloquium, The Combinatorialization of Linear Recurrences, April 27, 2010
- DIMACS Z = 60 Conference in Celebration of Doron Zeilberger’s 60th Birthday, Rutgers, NJ, The Combinatorialization of Linear Recurrences, May 27, 2010
- North Dakota Title I Special Education Summer Symposium, Bismarck, ND, Secrets of Mental Math (9 Lectures), July 13 to 14, 2010
- MAA MathFest, Pittsburgh, PA, Combinatorial Trigonometry, August 5, 2010
- CGU School of Education, Claremont, CA, Secrets of Mental Math (4 lectures), August 25, 2010
- CGU School of Education, Claremont, CA, Secrets of Mental Math (4 lectures), September 1, 2010
- CGU School of Education, Claremont, CA, Secrets of Mental Math (2 lectures), September 7, 2010
- Carnegie Mellon University, Pittsburgh, PA, Combinatorial Trigonometry, September 13, 2010
- CGU School of Education, Claremont, CA, Secrets of Mental Math (2 lectures), September 15, 2010
- Denison University, Gambier, OH, Secrets of Mental Math (5 lectures), September 27, 2010
- Ohio Valley University, Vienna, WV, Secrets of Mental Math (8 lectures), September 28 to 29, 2010
- SACNAS Conference, Anaheim, CA, The Best Way to Knock ’em Down, October 1, 2010
- Johns Hopkins University (Alan J. Goldman Lecture), Baltimore, MD, Combinatorial Trigonometry, October 7, 2010
- California State University Mathematics Colloquium, San Bernardino, CA, Combinatorial Trigonometry, October 27, 2010
- University of Southern California, Visions, and Voices, Los Angeles, CA, Calendar Oddities, October 27, 2010
- Teachers Teaching With Technology (T3) Conference, Calculus Mini-Conference, San Antonio, TX, I Come to Bury Calculus, Not to Praise it, February 26, 2011
- Bellevue College, Center for Excellence for Information and Computing Technologies, Bellevue, WA, Mathematics Education: Dreams and Nightmares, March 10, 2011
- Association for Christians in Mathematical Sciences, Santa Barbara, CA, Combinatorial Trigonometry, June 2, 2011
- Davidson Young Scholar Summit, Reno, NV, Conversation with the Mathemagician, June 18, 2011
- MAA MathFest, Lexington, KY, Speding Your Summers Effectively and Efficiently, August 3, 2011
- MAA MathFest, Lexington, KY, Mathematics and Backgammon Quiz, August 4, 2011
- Mills College, Oakland, CA, Mathematical Card Tricks, September 28, 2011
- Joint Meetings of the AMS/MAA, Boston, MA, I Come to Bury Calculus, Not to Praise it, January 4, 2012
- Joint Meetings of the AMS/MAA, Boston, MA, Counting on Students: Combinatorial Proofs with Undergraduates, January 5, 2012
- Joint Meetings of the AMS/MAA, Boston, MA, Mathematics and Backgammon (2-day Minicourse), January 5 and 7, 2012
- Davidson College, Davidson, NC, Counting on Students: Combinatorial Proofs with Undergraduates, March 16, 2012
- University of South Carolina, Columbia, SC, Counting on Students: Combinatorial Proofs with Undergraduates, March 23, 2012
- Pomona College, Claremont, CA, Math is HARD! (panel on math education for Pomona Student Union), April 5, 2012.
- CGU School of Education, Claremont, CA, The Mathematics of Games and Puzzles (2 Lectures), June 19, 2012.
- CGU School of Education, Claremont, CA, The Mathematics of Games and Puzzles (2 Lectures), June 26, 2012.
- CGU School of Education, Claremont, CA, The Mathematics of Games and Puzzles July 5, 2012.
- CGU School of Education, Claremont, CA, The Mathematics of Games and Puzzles (2 Lectures), July 10, 2012.
- University Philosophical Society, Dublin, Ireland. Secrets of Mental Math, October 10, 2012.
- Maths Society, Trinity University, Dublin, Ireland. Games You Can’t Lose, October 10, 2012.
- Texas Christian University, Fort Worth, TX. Combinatorial Trigonometry, October 24, 2012.
- Texas Christian University, Fort Worth, TX. The Mathematics of Games and Puzzles, (2 lectures), October 24, 2012.
- Texas Christian University, Fort Worth, TX. The Mathematics of Games and Puzzles, (2 lectures), October 25, 2012.
- Backgammon Live!, London, England. Rapid Pip Counting, November 10, 2012.
- Cornell University, Ithaca, NY. Combinatorial Trigonometry, March 12, 2013.
- Cornell University, Ithaca, NY (Kieval Lecture), Secrets of Mental Math, March 12, 2013.
- DePaul University, Chicago, IL, Combinatorial Trigonometry, April 19, 2013.
- The Magic Circle, London, England, Mathematical Magic, April 22, 2013.
- Higher Colleges of Technology, Abu Dhabi, United Arab Emirates, The Beauty and Power of Mathematics, April 25, 2013.
- Oxford University, Oxford, England, Marcus’s Mathemagicians, Mathemagics!, May 20, 2013.
- TED Global, Edinburgh, Scotland, The Magic of Fibonacci Numbers, June 13, 2013.
- Towson University, Towson, MD, Combinatorial Trigonometry, October 24, 2013.
- Insight Cruises, Patagonia, South America, Secrets of Mental Math, November 5, 2013.
- Insight Cruises, Patagonia, South America, Mathematics of Games and Gambling, November 8, 2013.
- Insight Cruises, Patagonia, South America, My Favorite Numbers, November 12, 2013.
- Insight Cruises, Patagonia, South America, How to Solve a Rubik’s Cube, November 13, 2013.
- Insight Cruises, Patagonia, South America, Discrete Mathematics, November 5, 2013.
- National Museum of Mathematics, New York, NY, Secrets of Mental Math, December 4, 2013.
- Joint Meetings of the AMS/MAA, Baltimore, MD, The Public Face of Mathematics (panel moderator), January 17, 2014.
- Youngstown State University, Youngstown, OH, Combinatorial Trigonometry, February 19, 2014.
- University of Texas, El Paso, TX, The Beauty and Magic of Mathematics, March 7, 2014.
- 16th International Conference on Fibonacci Numbers and its Applications, University of Rochester, Rochester, NY, In Search of Combinatorial Proofs of Fibonomial Identities, July 24, 2014.
- Southern California-Nevada Section of the MAA, Pomona College, Claremont, CA, Combinatorial Proofs of Fibonomial Identities, November 1, 2014.
- Renaissance Weekend, Charleston, SC. Mathematics of Games, Gambling, and Hustles, December 30, 2014.
- Renaissance Weekend, Charleston, SC. Secretes of Mental Math, December 30, 2014.
- Renaissance Weekend, Charleston, SC. Mathematical Card Tricks, December 31, 2014.
- Joint Meetings of the AMS/MAA, San Antonio, TX, Combinatorial Proofs of Fibonomial Identities, January 10, 2015.
- Georgetown Day School, Washington DC, Fibonacci Numbers and Linear Algebra, February 6, 2015.
- Pi Mu Epsilon Chapter of West Virginia University, Morgantown WV, Mathematics of Games and Gambling, April 10, 2015.
- Michigan State University, Distinguished Lecture Series, Lansing MI, Combinatorial Trigonometry, April 18, 2015.
- California Polytechnic University, Distinguished Mathematics/Statistics Speaker, Pomona CA, Mathematics of Games, Scams, and Hustles, May 15, 2015.
- Skeptics Society conference on Big Science, Big History, and the Future of Humanity, Pasadena, CA, The Future of Mathematics, May 30, 2015.
- Freedom Fest, Las Vegas, NV, The Magic of Math, July 10, 2015.
- MAA MathFest, Washington DC, minicourse on The Mathematics of Games and Gambling, August 5 and 7, 2015.
- MAA MathFest, Washington DC, invited Student Activities Lecture, The Secrets of Mental MAAth, August 6, 2015.
- 8th International Conference on Lattice Path Combinatorics and Applications, Pomona CA, Combinatorial Proofs of Fibonomial Identities, August 19, 2015.
- Proof School, San Francisco CA, The Beauty and Magic of Mathematics, September 11, 2015.
- Town Hall, Seattle WA, The Beauty and Magic of Mathematics, September 14, 2015.
- National Museum of Mathematics, New York NY, The Beauty and Magic of Mathematics, September 23, 2015.
- Author and Ideas Festival, Pebble Beach CA, The Beauty and Magic of Mathematics, September 27, 2015.
- 2015 STEM Education Conference, (Keynote Speaker), Virginia Military Institute, Lexington VA, The Beauty and Magic of Mathematics, October 7, 2015.
- Insight Cruises, Sydney, Australia, Secrets of Mental Math, October 30, 2015.
- Insight Cruises, Sydney, Australia, Mathematics of Games and Gambling, October 31, 2015.
- Insight Cruises, Sydney, Australia, My Favorite Numbers, November 1, 2015.
- Insight Cruises, Sydney, Australia, Discrete Mathematics, November 1, 2015.
- Bowdoin College, Brunswick ME, Odd Numbers in Pascal’s Triangle, November 12, 2015.
- Bowdoin College, Brunswick ME, Mathematics of Games, Gambling and Hustles, November 12, 2015.
- Science Salon, Altadena, CA, Interview with Arthur Benjamin, January 24, 2016.
- Metroplex Math Circle, Dallas, TX, Secrets of Mental Math, February 4, 2016.
- The 47th Southeastern International Conference on Combinatorics, Graph Theory and Computing (Plenary Speaker), Boca Raton, FL, Tilings with Fibonomials, q-binomials, and Chebyshev Polynomials, March 11, 2016.
- Cawe Western Reserve University, Cleveland, OH, Combinatorial Trigonometry, March 16, 2016.
- The 17th International Conference on Fibonacci Numbers and their Applications, Caen, France, A Bijective Proof of a Derangement Recurrence, June 29, 2016.
- MAA MathFest (Keynote Speaker (MAA Invited Lecturer)), Columbus, OH, Magical Mathematics, August 5, 2016.
- National Museum of Mathematics (MOMATH), New York, NY, Cards, Calculations, and Combinatorics: The Mathematical Magic of Art Benjamin, October 1, 2016.
- Las Vegas Math Circle, Claremont, CA, Mathematical Card Tricks, October 29, 2016.
- Applied Mathematics Institute, Valley Christian Schools, Magical Mathematics, March 10, 2017.
- MAA MathFest, Chicago, IL, The Bingo Paradox, July 7, 2017.
- Mathematics of Various Entertaining Subjects (MOVES) Conference (Keynote), The Bingo Paradox, August 8, 2017.
- Claremont Mathematics Colloquium, Claremont, CA, Bingo Paradoxes, November 15, 2017.