Arts enrichment provides varied channels for acquiring school readiness skills and may offer important educational opportunities for students from diverse backgrounds and with diverse needs. Study 1 examined achievement within an arts enrichment preschool that served low-income children. Results indicated that students practiced school readiness skills through early learning, music, creative movement, and visual arts classes. Students who attended the preschool for 2 years demonstrated higher achievement than those who attended for 1 year, suggesting that maturation alone did not account for achievement gains. Across 2 years of program attendance and four time points of assessment, students improved in school readiness skills, and there were no significant effects of race/ethnicity or developmental level on achievement growth. Study 2 compared students attending the arts enrichment preschool to those attending a nearby alternative on a measure of receptive vocabulary that has been found to predict school success. At the end of 1 year of attendance, students in the arts program showed greater receptive vocabulary than those at the comparison preschool. Results suggest that arts enrichment may advance educational outcomes for children at risk. (Contains 4 tables.)