This report is one of five submitted as products of a "Study Designed to Assist Planning of Research on Significant Instructional Features in Bilingual Education Programs." The reports are intended to assist the National Institute of Education (NIE) in its plans for a major new research study in bilingual education. The present report presents two alternative study designs and plans for implementation of the instructional features study. It is based on the knowledge base assembled in the three preceding reports. Each of the two designs is described in terms of a series of studies covering such subjects as the classroom, student case histories, contextual features, management, consumer attitudes, and language acquisition and use. Sample design is also discussed at length. The designs are presented for the information of NIE, and are not intended for direct use in a Request for Proposal. (Author/JB)