In "Abbott v. Burke" the New Jersey Supreme Court determined that the state constitutional guarantee to a thorough and efficient education must include a supplemental program designed to wipe out the deficits poor children bring with them to school. In this report, the Education Law Center draws on educational research to identify the programmatic elements needed to meet the needs of disadvantaged students. The supplemental program for the elementary level includes the following components: (1) full-day kindergarten and one level of preschool; (2) reduced class size below 15 students through third grade; (3) school-based youth and family services; (4) parent education and participation in school and classroom; (5) extended school day and year; (6) bilingual and/or English As a Second Language programs; and (7) a research-based instructional intervention such as "Success for All," designed for children with disadvantages. At the middle and high school levels, the supplemental program includes several of these interventions plus an alternative school program and a school-to-work or college transition program. The Abbott v. Burke decision limits the requirement for a supplemental program to those districts covered by the Court order, the identified special needs districts, but this report recommends that the supplemental program be available to students in any district where 20 or more disadvantaged students are enrolled in any grade. (SLD)