Show 20 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: author="Erstadt, Ola" or (type any "bookEditor issueEditor" and editor="Erstadt, Ola") Add to list Journal Article A1 open access Developing a validated instrument to measure pre-service teachers’ ICT competencies : meeting the demands of the 21st-century Jo Tondeur (UGent) , Koen Aesaert (UGent) , Bram Pynoo (UGent) , Johan van Braak (UGent) , Norbert Fraeyman (UGent) and Ola Erstadt (2017) BRITISH JOURNAL OF EDUCATIONAL TECHNOLOGY. 48(2). p.462-472