This document includes a three-part set of Parent Briefs that focus on supplemental security income. The first Brief (published in March 2003)provides basic information on Supplemental Security Income (SSI), the federal income support program for people who have disabilities and limited income and resources. It identifies myths about SSI eligibility and discusses the use of SSI as young people make the transition from school to work and the advantages of receiving financial support for basic living expenses and being eligible for Medicaid. The second Brief, "So You Have Decided to Apply," (published in April 2003) provides information on adult eligibility guidelines of income (less than $800 per month) and resources (less than $2,000) and provides a guide to the application process. The decision making process of the Disability Determination Service (DDS) is explained, noting criteria concerned with the severity of the impairment, the impairment's equivalence to a "listed impairment," the applicant's work and earnings history, and the applicant's ability to do any other kind of work. Topics addressed in the last Brief, "Your Right To Appeal," (published in September 2003) include: if you were denied SSI; some of the common reasons for denial; applying for benefits; the four levels of the SSI Appeals Process; sample situations; related resources available online; how decisions are made; and choosing someone to represent you in the Appeals Process. (DB)