English language development is a critical component for young children's school readiness. In this study, we examined the effect of "Read it again-Pre-K!" (Justice and McGinty in Read it again!-Prek: a preschool curriculum supplement to promote language and literacy foundations, Crane Center for Early Childhood Research and Policy, Columbus, 2013), a literacy curriculum designed to prepare young children's school readiness on the English literacy skills of Korean dual language learners in general education. Using a multiple probe design, eight 4- to 5-year-old Korean dual language learners (1 female, 7 males) received 1:1 online synchronous daily instruction over 2 months during the summer before entering their kindergarten programs. Through the intervention, all eight children demonstrated increases in the use of English vocabulary, story comprehension, and oral fluency. Post-intervention data on vocabulary and reading fluency through three standardized tests, Dynamic Indicators of Basic Early Literacy Skills, Peabody Picture Vocabulary Test, and Expressive Vocabulary Test, showed improvement over baseline for most children. Discussion and implications for future research were provided.