Team teaching originated in 1954 at Harvard University and involves two or more teachers sharing responsibility for student instruction. It has the objectives of improving instruction quality by utilizing teacher talents and resources. Characteristics include flexible planning, shared responsibility, and consideration of student and school needs. Procedures include planning, organizing instruction such as lead lectures, and evaluating student performance. Advantages are improved learning outcomes for students and professional development for teachers. Disadvantages can include lack of training, role conflicts, and loss of individual autonomy.