Invited Talks

•  1986 – UNESCO Symposium "Computers and Education - Which Role for International Research", Stanford , USA
•  1989 – Workshop with students from UC DAVIS, Davis , USA
•  1992 – The Seventh Congress on Mathematical Education ICME-7, Quebec , Canada
•  1994 – IFIP Working Conference, Rosemont College , PA , USA
•  1994 – Stevens Institute of Technology , NJ , USA
•  1996 – UNESCO Second International Congress on Education and Informatics, Moscow
•  1997 – Eurologo, Budapest , Hungary
http://eurologo.web.elte.hu/prog.htm#2nd
•  2001 – Eurologo, Linz , Austria
http://www.eurologo.org/eurologo2001/eurologomemo.html
•  2002 – Infovek conference, Bratislava , Slovakia
http://www.infovek.sk/konferencia/2002/02stvrtok/pp-sendova.php
•  2003 – NSF ( USA )
•  2003 – University of Ohio , USA
http://www.ohio.edu/
•  2005 - Stevens institute of Technology , NJ , USA
http://www.stevens.edu/main/home
•  2005 – Eurologo, Warsaw, Poland
http://eurologo2005.oeiizk.waw.pl/fullpapers.php
2007 – Eurologo, Bratislava. Slovakia
http://www.eurologo2007.org/
2007 – Adger University College, Norway