web-based application / web-browsers using touch control / dynamic mathematics software / Touch devices / learning tool / on touch devices / trigonometry using computer software / /
Organization
Department of Instructional Technology / Dutch government / University of Twente / Faculty of Computer Science / Cognitive Science Society / Free University / Amsterdam / Faculty of Behavioural Sciences / /
Person
Nellie Verhoef / Wouter van Doorn / Gerard Jeurnink / Ricco Veldkamp / Marion Alferink / /