Essential+Element++++++Scientifically+Based+Core+and+Intervention

Instruction and intervention at all levels of intensity (Tiers 1, 2, and 3) within an RtI model is scientifically-based, or based on rigorous research in //content// covered and //methods// used. For example, in the area of reading, the //content// of scientifically-based instruction and intervention programs includes the “Big Ideas” found in research and outlined by the National Reading Panel: phonemic awareness, alphabetic principle, fluency, comprehension, and vocabulary. Scientifically-based instructional //methods// for all content areas include modeling, providing multiple opportunities for active student responding and guided practice, and providing corrective feedback. Appropriate scientifically-based instructional materials at all levels of intensity provide a systematic scope and sequence that includes clear guidelines about which skills are taught and the order in which content are introduced. These materials can be used to differentiate instruction based on the level of student need (i.e., to support students, including English language learners, who are performing above grade level, at grade level, slightly below grade level, significantly below grade level, etc.). The scientifically-based instruction and intervention materials employed are appropriate for a system that uses student data and clearly-specified decision rules to guide implementation.
 * //Scientifically-Based Core Instruction and Intervention //**