UPSTART is a pilot project established by the Utah state legislature that uses a home-based education technology approach to develop the school readiness skills of preschool children. In its fourth year of operation during the 2012-13 school year, the project's implementation contractor -- the Waterford Institute -- enrolled 1,250 preschool children and provided them a game formatted program of early literacy instruction delivered by personal computers and the Internet, designed to prepare them academically for kindergarten. The 1,250 children enrolled in the fourth year cohort, hereafter referred to as C4, participated in the UPSTART program from August 2012 through June 2013. The evaluation of UPSTART's fourth year of implementation used a pretest-posttest control group design to assess the program's impact on developing the children's early literacy skills in preschool. (author abstract)