Although coteaching has become a widespread instructional option for students with disabilities, there are concerns regarding its effectiveness on student achievement especially at the secondary level. The authors examined whether ninth grade students with learning disabilities (LD) who received instruction in a resource classroom achieved at a comparable level to students with LD who received instruction in a cotaught general education classroom. The findings indicate that the students with LD in the resource classroom achieved at a better level than did those students who received their instruction in the cotaught classroom. Implications and suggestions for further research are discussed.