A meta-analysis of co-teaching research - Where are the data?

Students with special needs are Increasingly being served in the general ed ucation classroom. Co-teaching is one service delivery option designed to m eet those needs. The purpose of this article is to synthesize data-based ar ticles pertaining to co-teaching between general and special education pers onnel. Of 89 articles reviewed, only 6 provided sufficient quantitative inf ormation for an effect size to be calculated. Effect sizes for the individu al studies ranged from low (0.24) to high (0.95), with an average total eff ect size of 0.40. Dependent measures were varied and included grades, achie vement scores, and social and attitudinal outcomes. Results indicate that f urther research Is needed to substantiate that co-teaching is an effective service delivery option for students with disabilities.