• University of Colorado at Boulder
• University of Illinois at Urbana-Champaign
• University of Texas at Austin
• Michigan State University
• Southern Illinois University
• DePaul University:
                                          21 October 2005
                                          4 November 2005
                                          8 November 2006
                                          10 October 2007

       Math Club Talks

• About a circle and beyond
• Some remarks about Cauchy's inequality
• About a problem from number theory
• Teachers' mistakes as a teaching tool
• The puzzling beauty of numbers
• A mathematical problem: easy or difficult?