Improving Middle-School Students’ Knowledge and Comprehension in Social Studies: a Replication
Educational Psychology Review (2015) - Comment
doi: 10.1007/s10648-014-9274-2  issn: 1040-726x  issn: 1573-336x 

Sharon Vaughn, Greg Roberts, Elizabeth A. Swanson, Jeanne Wanzek, Anna-Mária Fall, Stephanie J. Stillman-Spisak