K-3 Plus was established in 2007 as a six-year pilot project that permitted schools with high numbers of at-risk students to begin the school year 25 days earlier for kindergarten through third grade. The purpose of the K-3 Plus program is to demonstrate that increased instructional time in kindergarten and the early grades narrows the achievement gap between at-risk students and other students, increases cognitive skills, and leads to higher achievement scores for all participants. K-3 Plus is conducted in high-poverty, public schools. For the purposes of K-3 Plus, "high-poverty, public school" means a public elementary school in which either 80 percent or more of the students are eligible for free or reduced-fee lunch at the time the school applies for the program or the school has earned a D or F school grade the previous year. K-3 Plus served 19,383 students in the summer of 2015--an increase of 1,327 students from the previous year in 246 schools, 53 districts, and 6 state charters. The program effectively targeted high-needs students, with participants more likely than other students to qualify for free or reduced-price lunch; be Hispanic, Native American, and/or English learners; or have been retained at least once. Participating schools are required to assess students in literacy using DIBELS. The Public Education Department (PED) uses those results in the evaluation of the program. Following statutory requirements, this report describes the following as they relate to the K-3 Plus program: (1) Demographics; (2) Program Requirements; (3) Assessment; (4) Instruction; (5) Evaluation and Reporting; and (6) Application Review/Funding. Additionally, the report provides a K-3 student summary and discusses assessment results and trends.