The purpose of this research overview is to analyze previous research and see how theeducational approach Content and Language Integrated Learning (CLIL) has affected students’ language development and subject knowledge. The study is aimed at the Swedish upper secondary school and focuses on language learning and knowledge development in the subject of ´History. The paper is based on the research question: How has the CLILapproach been implemented in history education for the purpose of promoting students’language development as well as subject knowledge, and how is this perceived from a teacher- and student perspective? Several search engines were used for the gathering of research articles for this overview, such as; ERIC, SWEPUB, Libsearch and to a small extent Google Scholar. In order to find the most relevant data, several inclusion and exclusion criteria were applied to the searches. During the process of evaluating relevant articles, a smaller version of an annotated bibliography was created to speed up the work process. The research shows that there are not any clear guidelines on how effective CLILeducation should be implemented and that the subject of History does not seem to benefit from the implementation of it. However, most researchers agree that further investigation regarding the content-part of CLIL is needed to get an understanding of how the implementation of such educational approaches affect both language development and subject knowledge.