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Education Research International
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2021
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Article
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Tab 5
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Research Article
Effect of the VAN Hiele Instructional Model on Students’ Achievement in Geometry
Table 5
Descriptive statistics of posttests scores for experimental and control groups.
Group
N
Mean
Std. deviation
Std. error mean
Experimental
40
56.36
18.888
2.987
Control
35
37.51
19.393
3.278