| 2018 |
Jagodina, Serbia |
History of Mathematics in Mathematics Education (October) Conducted a workshop on the Platonic solids.
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| 2017 |
Waterloo, Ontario, Canada |
Bridges 2017, International Mathematics and Art Conference (August) Link to paper.
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| 2016 |
Jyväskylä, Finland |
Bridges 2016, International Mathematics and Art Conference (August) Link to paper. Link to pieces in Art Exhibition.
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Vienna, Austria |
Symmetry Festival — 2016, Multidisclipinary Conference and Art Festival (July) Presented the paper Koch-like Fractal Images. |
| 2015 |
Baltimore, Maryland, USA |
Bridges 2015, International Mathematics and Art Conference (July) Link to paper. |
| 2014 |
Denver, Colorado, USA |
8th Biennial Conference of the International Committee on Mathematical Creativity and Giftedness (July) |
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Beijing, China |
The 4th National Principals' Training Symposium: Educating Talented Students (March) Download. |
| 2012 |
Bangkok, Thailand |
Institute for the Promotion of Teaching of Science and Technology (July) Web page. |
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Busan, South Korea |
7th Biennial Conference of the International Committee on Mathematical Creativity and Giftedness (July) Web page. |
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Seoul, South Korea |
12th Quadrennial Conference of the International Congress on Mathematical Education (July) Web page. |
| 2011 |
Bangkok, Thailand |
Institute for the Promotion of Teaching of Science and Technology (June) Web page. |
| 2010 |
Riga, Latvia |
6th Biennial Conference of the International Committee on Mathematical Creativity and Giftedness (July) Web page. |
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Riga, Latvia |
5th Biennial Conference of the World Federation of National Mathematics Competitions (July) Web page. |
| 2009 |
Graz, Austria |
Polyhedra workshop at Bundesrealgymnasium Kepler (July) |
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Dover, England |
Simon Langton Grammar School and the Langton Institute for Young Mathematicians (June) Web page. |
| 2008 |
Monterrey, Mexico |
11th Quadrennial Conference of the International Congress on Mathematical Education (July; attended only) |
| 2006 |
Trondheim, Norway |
International Commission on Mathematical Instruction's Study 16 on Challenging Mathematics (June-July) |