Does calculation or word-problem instruction provide a stronger route to prealgebraic knowledge?
Journal of Educational Psychology (2014) - Comment
doi: 10.1037/a0036793  issn: 1939-2176  issn: 0022-0663  pubmed: 25541565 

Lynn S. Fuchs, Sarah R. Powell, Paul T. Cirino, Robin F. Schumacher, Sarah Marrin, Carol L. Hamlett, Douglas Fuchs, Donald L. Compton, Paul C. Changas