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The Sheltered Instruction Observation Protocol (SIOP) was developed to make content material comprehensible to English Language Learners. This model is the result of the work of Jana Echevarria, MaryEllen Vogt and Deborah J. Short.
The SIOP Model includes teacher preparation, instructional indicators such as comprehensible input and the building of background knowledge. It comprises strategies for classroom organization and delivery of instruction. To read the document click on the image.