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ERIC Number: EJ1161156
Record Type: Journal
Publication Date: 2017-Nov
Pages: 47
Abstractor: As Provided
ISSN: ISSN-0021-8251
Predicting Student Achievement Using Measures of Teachers' Knowledge for Teaching Geometry
Mohr-Schroeder, Margaret; Ronau, Robert N.; Peters, Susan; Lee, Carl W.; Bush, William S.
Journal for Research in Mathematics Education, v48 n5 p520-566 Nov 2017
This article describes the development and validation of two forms of the Geometry Assessments for Secondary Teachers (GAST), which were designed to assess teachers' knowledge for teaching geometry. Both forms were developed by teams of mathematicians, mathematics educators, psychometricians, and secondary classroom geometry teachers. Predictive validity for the GAST assessment was explored by observing and testing 157 teachers as well as administering pre- and post-tests to 3,698 students. The reliability coefficient for both GAST assessment forms was acceptable (r = 0.79). GAST assessment scores explained a statistically significant but small amount of the variance of student scores, demonstrating an effect that was greater than the number of years of teaching experience but smaller than the effect of having an advanced degree.
National Council of Teachers of Mathematics. 1906 Association Drive, Reston, VA 20191. Tel: 800-235-7566; Tel: 703-620-9840; Fax: 703-476-2570; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research; Tests/Questionnaires
Education Level: Secondary Education
Audience: N/A
Language: English
Sponsor: National Science Foundation (NSF)
Authoring Institution: N/A
Identifiers - Location: Kentucky (Louisville)
Grant or Contract Numbers: 0821967