This document discusses assessment in Content and Language Integrated Learning (CLIL). It states that assessment should be an integral part of every CLIL lesson, with clear learning outcomes and success criteria established and shared with students. Students should be involved in self- and peer-assessment, and receive feedback on their performance. When assessing, one must consider whether to assess content or language first, as well as cognition and culture. The document outlines some key principles for CLIL assessment, including having clear objectives, a mixture of formal and informal assessments, and involving students in the assessment process.