CLIL Essentials for Secondary School Teachers outlines the driving principles of CLIL from both the content and language teachers' perspectives. It offers a substantial bank of scaffolding techniques to help improve student learning of both content and language. The book provides numerous practical strategies for using formative assessment in CLIL. These strategies build assessment literacy to support students in becoming effective and autonomous learners of content and language. The core characteristics and elements of academic language are described alongside multiple techniques to help students understand and use this language. Intercultural competences are uncovered along with techniques for teaching them.