Improving at-risk learners’ understanding of fractions
Journal of Educational Psychology (2013) - Comment
doi: 10.1037/a0032446  issn: 1939-2176  issn: 0022-0663 

Lynn S. Fuchs, Robin F. Schumacher, Jessica Long, Jessica Namkung, Carol L. Hamlett, Paul T. Cirino, Nancy C. Jordan, Robert Siegler, Russell Gersten, Paul Changas