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What is co-teaching?
Co-teaching is typically perceived as two educational professionals working together to service a group of heterogeneous learners. The most common teams of educators found to engage in co-teaching relationships are:

  1. special and general educators
  2. paraprofessional and a special or general educator
  3. two general education teachers
  4. speech/language pathologists and a special educator or general educator
  5. social worker and a special educator or general educator
  6. other support personnel (volunteers) and special educator or general educator
  7. elective teachers (P.E., music, art, computers, foreign languages, etc.) and a special educator or general educator
These teams come together for a common purpose, typically to meet a wide range of learners more effectively. These teams may have a long-term agenda for working together (an entire academic year) or short-term agendas such as completing a unit together or preparing students for some specific skills (e.g., state testing, science project). Despite the numerous co-teaching relationships that can exist, for the purpose of this module, the examples will focus on collaboration between general and special education teachers in the general education classroom. If you have other types of relationships in your school, then simply reflect on how those roles relate to the ones described. 

Types of teaching, summarized.
http://www.specialconnections.ku.edu/?q=collaboration/cooperative_teaching/teacher_tools/types_of_co_teaching