The Children's Museum in Boston developed MATCH Boxes (Materials and Activities for Teachers and Children) to provide self-contained, multi-media kits for elementary school use. The project sought to determine an optimum balance of activities and various media which would involve the student directly in the learning process and would make use of the vast amount of learning potential which is non-verbal in character. A total of 114 boxes on 16 topics, largely in the social sciences, were assembled. Each box contained enough real objects, filmstrips, pictures, games, and supplies for 30 students to investigate the topic for two to three weeks. A teacher's guide offered lesson plans and information about the materials with the purpose of helping the teacher to pattern a three-way encounter between herself, the children, and the materials. The boxes were developed by teams of subject matter specialists, teachers, artists, and technicians over a period of four years. Three generations of boxes were evaluated. The teachers participating in the testing phase were asked to make a daily and an overall appraisal of the materials. Random visits by observers provided more information about the usefulness of the boxes. A second volume of the report contains analysis and evaluation of the project. (JY)