"Ready, Set, Leap!"[R] is a comprehensive preschool curriculum that focuses on early reading skills such as phonemic awareness, letter knowledge, and letter-sound correspondence using multi-sensory technology that incorporates touch, sight, and sound. The "Ready, Set, Leap!"[R] curriculum is available in English and Spanish. One study of Ready, Set, Leap![R] met the What Works Clearinghouse (WWC) evidence standards. The study included 254 low-income preschool children enrolled in 17 inner-city schools in Newark, New Jersey. This report focuses on immediate posttest findings to determine the effectiveness of the intervention. The WWC considers the extent of evidence for "Ready, Set Leap!"[R] to be small for oral language, print knowledge, phonological processing, and early reading/writing. No studies that met WWC evidence standards with or without reservations addressed cognition or math. "Ready, Set, Leap!"[R] was found to have no discernible effects on oral language, print knowledge, phonological processing, and early reading/writing skills. (Contains 6 footnotes.) [The following study is reviewed in this intervention report: RMC Research Corporation. (2003). Ready, Set, Leap! program: Newark prekindergarten study 2002-2003 final report. Retrieved from Leap Frog Schoolhouse Web site: http://www.leapfrogschoolhouse.com/content/research/RMC_RSLreport.pdf.]