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Keyword
- academic performance[remove]1
- cognitive abilities1
- elementary and middle school[remove]1
- ethnicity1
- free or reduced lunch1
- gender difference1
- hierarchical model1
- income1
- language arts1
- longitudinal1
- male or female variability1
- math1
- multilevel analysis1
- neurodevelopment1
- puberty1
- science[remove]1
- sex difference1