The Spanish Literacy Investigation Project was implemented to identify adult Spanish literacy programs throughout the country, to explore the availability of relevant Spanish literacy teaching methods, to determine relevant elements between Spanish literacy and English as a Second Language (ESL), and to describe a model for incorporating a Spanish literacy program into an existing adult basic education program. During the first stage of the project, researchers conducted on-site visits, classroom observations, and personal interviews with administrators or participants in the following four programs: Instituto de Progreso Latino, in Chicago; Solidaridad Humana, in New York City; Universidad Internacional, in the West Town and Humble Park sections of Chicago; and Universidad Popular/Centro Latino, in Chicago. Next, the researchers reviewed current literature pertaining to Spanish literacy and adult learning in order to obtain information focusing specifically on language acquisition, the adult learner, ESL, and literacy. Based on a survey of the experiences of 26 agencies concerning their involvement in the field of Spanish literacy instruction, the researchers identified key elements of successful adult Spanish literacy programs. The final phase of the project resulted in an annotated list of Spanish literacy materials. (The bibliography is included in this report.) (MN)