The article discusses content and language integrated learning (abbreviation CLIL), which is the study of the content of a subject or discipline using a target language, which can be either foreign or the second language used in a country or a particular region. An analysis of teaching aids on biological disciplines that are used within CLIL was carried out. The analysis was based on criteria proposed by Peeter Mehisto in 2012. These criteria make it possible to create a more effective teaching aids within the framework of content and language integrated learning. Teaching aids from some countries, including the Republic of Kazakhstan, were selected for analysis. The period of publication of the teaching aids varies from 2005 to the present. The analysis of teaching aids in biological disciplines used within CLIL demonstrated varied results.