What research is the SIOP Model based upon?
The SIOP Model was developed by researchers at California State University, Long Beach (Jana Echevarria and Mary Ellen Vogt), and the Center for Applied Linguistics (Deborah J. Short) under the auspices of the Center for Research on Education, Diversity & Excellence (CREDE), a national research center funded by the U.S. Department of Education from 1996 through 2003. The CREDE researchers worked with middle school teachers in four large metropolitan school districts to identify key practices for sheltered instruction and develop a professional development model to enable more teachers to use sheltered instruction in their classrooms. After five years of collaboration with practicing teachers, CREDE researchers developed a model of high quality sheltered instruction, now known as the SIOP Model. A later study was conducted to establish the validity and reliability of the Sheltered Instruction Observation Protocol; it found the protocol to be a highly reliable and valid measure of shelte
