Abstract
This article highlights the importance of integrated subject and language teaching. CL1L (Content and Language Integrated Learning) - learning a second language through an integrated program. Today it is the main tool for the formation and implementation of multilingualism. The term was first coined by David Marsh. It has a dual purpose: the first is to master the subject; the second is mastering a foreign language (as a second language). There are also effective ways to use the strategies of critical thinking through reading and writing, such as "Jigsaw", "Six thinking hats", "Value Line", "Snowball", "A visit to the Picture Gallery".