The document provides an overview of the Sheltered Instruction Observation Protocol (SIOP) model for teaching English language learners. It describes the SIOP as a planning tool and observation protocol designed to define, develop, and test sheltered instruction strategies. The SIOP integrates language and content instruction and focuses on explicitly teaching language skills needed to access and participate in the curriculum. It consists of eight components: preparation, building background, comprehensible input, strategies, interaction, practice/application, lesson delivery, and review/assessment. Examples of strategies discussed include thinking-write-share, language demands analysis, and setting clear content and language objectives.