Jonas Hall is chairman of the Swedish GeoGebra Institute and works at Rodengymnasiet in Norrtälje north of Stockholm.
Svetlana Yushmanova is a high school teacher in mathematics and English in Falköping as well as a teaching material author. She holds courses in GeoGebra for teachers within a day’s journey from Falköping, usually together with Anders Karlsson. Examples of course plans and references can be found at http://www.visuellmatematik.se/teacher.
Anders Karlsson is a high school mathematics teacher in Falköping. Anders is, among other things, known for the YouTube channel Matteskolan. He holds courses in GeoGebra for teachers within a day’s journey from Falköping, usually together with Svetlana Yushmanova. Examples of course plans and references can be found at http://www.visuellmatematik.se/teacher.
Thomas Lingefjärd is active in mathematics didactics at the University of Gothenburg, where he works with e.g. teacher education.
Svenska GeoGebrainstitutet 