- 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.

Additionally, I have presented my Mathemagics show on over one thousand occasions over the last 25 years.

To return to my Curriculum Vitae, click here.

To return to my homepage, click here.