Media type: E-Article Title: Characteristics of mathematical tasks and social class-related achievement differences among primary school children Contributor: Schuchart, Claudia; Buch, Susanne; Piel, Sarah imprint: Elsevier BV, 2015 Published in: International Journal of Educational Research Language: English DOI: 10.1016/j.ijer.2014.12.002 ISSN: 0883-0355 Keywords: Education Origination: Footnote: