The Sheltered Instruction Observation Protocol (SIOP) is a research-based instructional model that has proven effective in addressing the academic needs of English language learners in the mainstream classroom. The SIOP Model consists of eight interrelated components: lesson preparation, building background knowledge, comprehensible input, strategies, interaction, practice/application, lesson delivery and review/assessment. Using instructional strategies connected to each of these components, teachers are able to design and deliver lessons that attend to the academic and linguistic needs of English learners.
Research shows that when teachers fully implement the SIOP Model, English language learners’ academic performance improves. Teachers report that SIOP-based teaching benefits all students, not just those who are learning English as an additional language.