Supplemental material
Journal of Research on Educational Effectiveness
Volume 11, 2018 - Issue 3
Intervention, Evaluation, and Policy Studies
Effectiveness of a “Grass Roots” Statewide Enrichment Program for Gifted Elementary School Children
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Ingo ZettlerDepartment of Psychology, University of Copenhagen, Copenhagen, Denmarkhttp://orcid.org/0000-0001-6140-7160View further author information
http://orcid.org/0000-0001-6140-7160View further author information, Norman RoseHector Research Institute of Education Sciences and Psychology, University of Tübingen, Tübingen, Germanyhttp://orcid.org/0000-0002-2908-205XView further author information
http://orcid.org/0000-0002-2908-205XView further author information, Ulrich TrautweinHector Research Institute of Education Sciences and Psychology, University of Tübingen, Tübingen, Germanyhttp://orcid.org/0000-0003-0647-0057View further author information
http://orcid.org/0000-0003-0647-0057View further author information, Marcus HasselhornGerman Institute for International Educational Research, Department of Education and Human Development, Frankfurt am Main, Germanyhttp://orcid.org/0000-0002-6617-2556View further author information
http://orcid.org/0000-0002-6617-2556View further author information & Benjamin NagengastHector Research Institute of Education Sciences and Psychology, University of Tübingen, Tübingen, Germanyhttp://orcid.org/0000-0001-9868-8322View further author information
http://orcid.org/0000-0001-9868-8322View further author information