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Harris, R. (2011, May 12). Study: State preschool improves social and language skills, but not math | catalyst-chicago.org. //catalyst-chicago.org | Independent Reporting on Urban Education Since 1990//. Retrieved December 17, 2012, from http://www.catalyst-chicago.org/notebook/2011/05/12/study-state-preschool-improves-social-and-language-skills-not-math


 * 1) Low-income preschoolers started out with worse scores than the overall sample of students. By kindergarten, they made significant gains, but were still behind other students
 * 2) By kindergarten, children’s vocabulary skills were slightly above average overall, while children from low-income families had nearly average scores.