He specializes in phenomenography, variation theory and lesson/ learning studies. His research interests focus on learning and teaching and teacher education. Recently, he extends his research focus to financial literacy and education for sustainable development. He has been the Editor of the SSCI journal ‘Educational Research Review’ since 2010, and the Editorial Board Member of ‘Vocations and Learning’, ‘International Journal for Lesson and Learning Studies’ and ‘International Review of Economics Education’.