No studies of Sheltered Instruction Observation Protocol® (SIOP®) that fall within the scope of the English Language Learners review protocol meet What Works Clearinghouse (WWC) evidence standards. The lack of studies meeting WWC evidence standards means that, at this time, the WWC is unable to draw any conclusions based on research about the effectiveness or ineffectiveness of SIOP® on English language learners. Additional research is needed to determine the effectiveness or ineffectiveness of this intervention.
The Sheltered Instruction Observation Protocol® (SIOP®) is a framework for planning and delivering instruction in content areas such as science, history, and mathematics to English language learners as well as other students. The goal of SIOP® is to help teachers integrate academic language development into their lessons, allowing students to learn and practice English as it is used in the context of school, including the vocabulary used in textbooks and lectures in each academic discipline. Using this planning framework, teachers modify the way they teach so that the language they use to explain concepts and information is comprehensible to these students. SIOP® is intended to be applicable at levels of education from pre-K through community college. The SIOP® model consists of instructional strategies that cover eight aspects of lesson design and delivery: lesson preparation, building background, comprehensible input, strategies, interaction, practice and application, lesson delivery, and review and assessment. The instructional strategies address the academic and linguistics needs of English language learners. In most cases, teachers receive professional development on the SIOP® model before using it to modify their lessons. This review of SIOP® focuses on research that examines its impact on the learning of English language learners in grades K–8.