Interdisciplinary education has been considered a key element of middle level education since the 1960s. Interdisciplinary teaching teams and multi-disciplinary and interdisciplinary units of study have been frequently found in middle level schools since then. Although changes have been incorporated to support it, actual implementation of interdisciplinary education continues to fall short of its full potential. While recognizing the need for schools to reflect the reality of life in an interdisciplinary world, it remains difficult to restructure content-separated curriculum into a more interdisciplinary, or integrated, one. This collection of articles offers guidance to both new and established teaching teams implementing integrated instruction programs. Articles in the first section focus on the positive aspects of team organization for teachers, the effects of teaming on students, and student evaluation of interdisciplinary units. The second section offers suggestions for organizing the teaching team and techniques for developing an integrated curriculum. The third section presents several examples of interdisciplinary instruction units that were implemented successfully in schools across the United States. The final section examines the evolutionary development of the interdisciplinary team, methods of evaluating the teaching team, and some of the limitations of, and problems associated with, interdisciplinary instruction. (TJQ)