Friend, M. (2002).  Interactions: Collaboration skills for school professionals.Boston: Allyn and Bacon.  Offers skills for educators to foster a collaborative environment.

Villa, R., Thousand, J. & Nevin, A. (2004).  A guide to co-teaching: Practical tips for facilitating student learning.  Thousand Oaks, Calif.: Corwin Press.  Great for first -time teacher teams.

Fattig, M. & Taylor, M. (2005).  Co-Teaching in the differentiated classroom: Successful collaboration, lesson design, and classroom management, Grades 5-12. San Francisco, CA:Josey-Bass.  Practical tools and strategies for teachers seeking to establish or improve collaborative teaching and differentiated instruction.

Murawski, W. (2010). Collaborative teaching in elementary schools: making the co-teaching marriage work! Thousand Oaks, CA : Corwin Press.  A thorough investigation of the elements of collaborative teaching; from building the relationship, classroom management, sharing responsibilities, planning instruction to working with parents.