5 | P a g e Sheltered Instruction Observation Protocol (SIOP) SIOP is a researched based lesson delivery model that links Content Objectives to Language Objectives. There are 8 components to SIOP along with 30 SIOP features. The 8 components of the SIOP lesson protocol are similar to a lesson plan format you may have learned in college education courses but keep in mind the varying levels of English Language Proficiency levels of the ELL students (English Language Learners).