However, this has not escaped criticism from teachers because there is “less agreement on whether this principle can be achieved in practice, and even if possible, what the impacts on inclusive education. results obtained by disabled pupils” in schools (Kalambouka et al. 2007). In their study, Kalambouka et al. (2007) suggest that there were “no adverse effects on pupils without special educational needs” in mainstream schools, with “81% of findings reporting positive or neutral effects”. However, selection bias is a potential concern because their research took place mainly in America, so the findings may not be applicable to UK schools and the impact on children with and without special educational needs will be in all situations.