The assessment portfolio is a collection of materials and forms for testing and recording student progress at F.S. Key Elementary School, Arlington, Virginia. The materials are designed for use in an elementary school two-way partial immersion program. Introductory sections discuss the use of portfolios for monitoring student performance and contain a checklist for assessing student use of reading strategies. The remainder of the materials are portfolio components from the student, parents, and teacher, and instructions for gathering and using them. Components originating with the student include a freehand self-portrait, language attitude questionnaire, writing samples from each grading period, and self-selected best work with self-evaluation. The parent component is a questionnaire concerning attitudes about language learning and the program, used at the beginning and end of the school year. The teacher component consists of anecdotal records, teacher-selected work, a reading miscue analysis conducted twice a year, an end-of-unit evaluation, and an optional teacher's log or work samples using computer word processing software. A portfolio checklist is also included. (MSE)