This article shows how the integration of native language in EFL classes affect positively the teaching and learning processes of English as a foreign language. The methodology shows a quantitative approach performing different processes and techniques adapted to the requirements of the investigation, data is the result of tests done to two groups of fifteen students in two class at a university, surveys and interviews. There is a theoretical research from authors about the use of native language in EFL classes which makes the investigation very solid. The results show that the integration of students' native language in the learning of English as a foreign language can help them achieve their learning goals.