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Download full textBrizuela, Bárbara M.; Martinez, Mara V.; Cayton-Hodges, Gabrielle A. – REDIMAT - Journal of Research in Mathematics Education, 2013
In this paper, we provide evidence of the impact of early algebra (EA) over time. We document this impact in the following ways: (a) by showing the performance over time of an experimental group of 15 children on an algebra assessment, from 3rd to 5th grade; and (b) by showing how the performance on an algebra assessment of children from an…
Descriptors: Algebra, Longitudinal Studies, Comparative Analysis, Statistical Analysis
Direct linkWagstaff, David A.; Elek, Elvira; Kulis, Stephen; Marsiglia, Flavio – Journal of Primary Prevention, 2009
A nonparametric bootstrap was used to obtain an interval estimate of Pearson's "r," and test the null hypothesis that there was no association between 5th grade students' positive substance use expectancies and their intentions to not use substances. The students were participating in a substance use prevention program in which the unit of…
Descriptors: Intervals, Prevention, Grade 5, Nonparametric Statistics
