The effects of scaffolding in the classroom: support contingency and student independent working time in relation to student achievement, task effort and appreciation of support
Instructional Science (2015) - Comment
doi: 10.1007/s11251-015-9351-z  issn: 0020-4277  issn: 1573-1952 

Janneke Van De Pol, Monique Volman, Frans Oort, Jos Beishuizen