What are the Most Commonly Reported Obstacles to Successful Co-teaching?

The entire literature review is to be completed in APA style including the references. Your literature review should be at least 5 full and complete pages in length (NOT including the title page, introduction, problem statement, conclusion, or reference pages) with a maximum length of 12 pages. Topic: What are the Most Commonly Reported Obstacles to Successful Special Education Inclusion? (ex. teacher preparadness/training, diverse academic levels, etc.)