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Keyword
academic performance
1
cognitive abilities
1
elementary and middle school
1
ethnicity
1
free or reduced lunch
1
gender difference
1
hierarchical model
1
income
1
language arts
1
longitudinal
1
male or female variability
[remove]
1
math
1
multilevel analysis
1
neurodevelopment
1
puberty
1
science
1
sex difference
1