Intervention > Evidence Snapshot

Sheltered Instruction Observation Protocol® (SIOP®)
English Language Learners

As of February 2013 no studies of Sheltered Instruction Observation Protocol® (SIOP®) were found that fell within the scope of the English Language Learners review protocol and met WWC design standards. Therefore, the WWC is unable to draw any research based conclusions about the effectiveness or ineffectiveness of Sheltered Instruction Observation Protocol® (SIOP®) to improve outcomes in this area.

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.

A group of closely related outcomes.

A summary of the effectiveness of an intervention in an outcome domain, based on the quality of research, the statistical significance of findings, the magnitude of findings, and the consistency of findings across studies.

Effectiveness Rating Key

Positive: strong evidence that intervention had a positive effect on outcomes.

Potentially Positive: evidence that intervention had a positive effect on outcomes with no overriding contrary evidence.

Mixed: evidence that intervention’s effect on outcomes is inconsistent.

No Discernible: no evidence that intervention had an effect on outcomes.

Potentially Negative: evidence that intervention had a negative effect on outcomes with no overriding contrary evidence.

Negative: strong evidence that intervention had a negative effect on outcomes.

For more, please see the WWC Glossary entry for rating of effectiveness.

Evidence Tier

The Department of Education’s evidence tiers. For more information, please see the WWC Glossary entry for evidence tiers.

The percent of each characteristic is based on the sample size of all studies meeting standards that reported data on the characteristic.

Percentages below may not add to 100 percent.

Last Updated: February 2013

Related Resources

WWC Summary of Evidence for Sheltered Instruction Observation Protocol® (SIOP®)

English Language Learners Evidence Review Protocol

See related studies

This intervention report was prepared for the WWC by Mathematica under contract ED-07-CO-0062.

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