Association Of Mathematics Teacher Educators (2) Wilmer, Mary (2) Spelic, Ivana (faculty Of Textile Technology, Mihelic-bogdanic, Alka (faculty Of Textile Technology, Hursa Sajatovic, Anica (university Of Zagreb (1) Hesse, Jürgen, Schrader, Hans Christian, Roelecke, Carsten (1) Meier, Tobias (1)