Collaborative Learning in Middle and Secondary Schools by 
Team-Based Learning in the Social Sciences and Humanities by Special Focus Issue: Small-Group Learning in Higher Education - Cooperative, Collaborative, Problem-Based, and Team-Based Learning. Journal on Excellence in College Teaching Volume 25, Numbers 3 and 4 (2014).
Source: http://celt.muohio.edu/ject/issue.php?v=25&n=3%20and%204
Source: http://cft.vanderbilt.edu/guides-sub-pages/cooperative-learning/
