1. Linz School of Education, Johannes Kepler University Linz, Linz, Austria
2. Mathematics Education - Faculty of Humanities, Arts, Social Sciences and Education; School of Education, University of New England, Armidale, Australia
3. School of Education, Wichita State University, Wichita, KS, USA
4. Graphic Record, Visualive, Hungary
5. Math Department Faculty, Qatar University, Doha, Qatar