This document discusses Content and Language Integrated Learning (CLIL), an educational approach where an additional language is used as the medium of instruction to teach both content and language skills simultaneously. It outlines key aspects of CLIL including the 4Cs framework, strategies to develop literacy, and pedagogical skills training needed for content teachers to effectively implement CLIL. The document also proposes a comprehensive teacher training program and follow up support to help content teachers in Saudi Arabia improve students' language and content learning through CLIL.