How to enable teachers to enhance all students’ understanding of percentages? A quasi-experimental field trial
Susanne Prediger 1 2 * , Jan Kuhl 3 , Sarah Schulze 3 , Claudia Wittich 4 , Imke Pulz 3 , Claudia Ademmer 1 , Christian Büscher 5
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1 IPN–Leibniz Institute for Science and Mathematics Education, Berlin/Kiel, GERMANY2 Institute for Development and Research in Mathematics Education, TU Dortmund University, Dortmund, GERMANY3 Special Education, TU Dortmund University, Dortmund, GERMANY4 University of Münster, Münster, GERMANY5 University Duisburg-Essen, Duisburg, GERMANY* Corresponding Author

Abstract

Enhancing understanding is crucial for all students. Instructional approaches have been developed to achieve this goal, yet little is known about the kind of support that teachers need for their effective implementation. We compare two support conditions designed to enable teachers to enhance students’ understanding of the mathematical topic percentages. 51 teachers and their grade 7 classes participated in a quasi-experimental pre-post-test control group design, comparing three groups. (1) Teachers of the material condition received the curriculum material of the MATILDA teaching unit on percentages, with a comprehensive teacher manual on the main principles of the approach. (2) Teachers in the workshop condition received the same materials and additionally participated in professional development (PD) workshops covering key ideas of the approach. (3) The waiting control group used their regular textbooks. Hierarchical regressions were used to compare the effects on students’ learning outcome. The analysis reveals that students in both support conditions achieved significantly higher learning outcomes than the control group, i.e., curriculum materials and teacher manuals seem to provide effective support. No additional effect on student outcomes was found for the workshop condition, but a substantially lower teacher dropout than in the material condition. This finding indicates that PD workshops may not be necessary for highly motivated volunteer teachers but can be completed by a wider range of teachers. The findings can inform implementation projects for educational innovations and inspire further research to determine for which teachers a written PD is sufficient and for which face-to-face workshops are more promising.

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Article Type: Research Article

INT ELECT J MATH ED, Volume 20, Issue 2, May 2025, Article No: em0816

https://doi.org/10.29333/iejme/15899

Publication date: 01 Apr 2025

Online publication date: 29 Jan 2025

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Article Downloads: 16

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