*Conjecture and Proof: Nurturing Creativity in the K-12 Classroom*, Triangle Math Teachers Circle, North Carolina State University, February 10, 2018.

*Problem-Solving the Math Circle Way*, workshop for graduate students and faculty, Florida State University, December 14, 2016.

*Frogs and Toads*, workshop for elementary and middle school students from the Tallahassee Math Circle, Calvary Orthodox Presbyterian Church, December 13, 2016.

*Mathematics and Its Teaching in the Muslim World*, Panelist, Teachers College – Columbia University, October 10, 2016.

*Do You Think Like a Mathematician?*, Hispanic Educational Summit, North Carolina State University, March 11, 2016.

*Mathematics and Its Teaching in the Southern Americas*, book presentation, University of Puerto Rico, Río Piedras Campus, April 15, 2015.

*Mathematics and Its Teaching in the Southern Americas*, book presentation, University of Puerto Rico, Carolina Campus, November 7, 2014.

*Mathematics and Its Teaching in the Southern Americas*, book presentation, University of Puerto Rico, Mayagüez Campus, November 4, 2014.

*The Decades Ahead*, Columbus Day Symposium: Mathematics Education in Latin America, Teachers College – Columbia University, New York, October 13, 2014.

*Math Circles Workshops*, Primer Coloquio sobre Matemática Educativa y Aplicaciones “Maestro Remigio Valdés Gámez,” Universidad Autónoma de Coahuila, Saltillo, MEXICO, January 27-28, 2014.

*Mathematics and Spirituality*, Center for Interdisciplinary Mathematical Sciences, Benares Hindu University, Varanasi, INDIA, February 4, 2014.

*Mathematical Puzzles: An Egalitarian Approach*, City College, City University of New York, May 22, 2012.

*Mathematical Puzzles: Liberating Remedial Instruction*, John Jay College of Criminal Justice, City University of New York, March 13, 2012.

*The History of Mathematics as a Didactic Tool, *UPR at Mayagüez, October 18, 2003.

*Special Secondary Schools: An International Panorama, *UPR at Mayagüez, September 25, 2003.

*Beautiful Minds Need Able Beholders – Preparing Middle School Teachers to Identify and Nurture Mathematical Talent*, City College, City University of New York, February 12, 2002.

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