• Environmental context and socioeconomic status shape preschool cognitive outcomes and the effectiveness of early education programs, with stronger gains in more structured, resource-rich settings [18], [16], [17], [19], [3], [1].

• Play and social interaction emerge as central mechanisms driving cognitive and socioemotional growth, with patterns of play, sociodramatic activities, and observed social exchanges linking to problem solving [10], [14], [13], [2], [11].

• Early screening, identification, and measurement of developmental risks and biases inform preschool practice, including learning disabilities screening, racial attitudes measures, and bias awareness across diverse groups [4], [20], [12], [15].

• Theoretical and programmatic frameworks—cognitive-developmental views and comparisons of traditional vs. structured curricula—shape preschool design and expected cognitive outcomes [6], [19], [16], [17].

• Racial and social integration dynamics in preschool settings reveal attitudes and color connotations, with studies on racial awareness and cross-group adaptation guiding inclusive practices [20], [12], [2], [10].