Projects of the New England Instructional Television Research Center (NITREC) are summarized in a collection of papers. Objectives, rationale, and program of NETREC are defined, along with methods of formative evaluation during production. Seven videotest research projects cover methods of evaluating communicative effectiveness of primary-grade educational television (ETV) presentations; methods for determining preschool children's comprehension of ETV program content; effects of format, soundtrack, and children's age on comprehension; appropriateness of age/grade designation, and evaluation of a bilingual program, "Mundo Real." (SK)