This document discusses using assessment-instruction links to support English Language Learners (ELLs) within a Response to Intervention (RTI) framework. It emphasizes using comprehensive assessment data to inform core instruction and identify students needing additional support. The three-tiered RTI model is described, with Tier 1 being the core instruction meeting over 80% of students' needs, Tier 2 providing targeted small group instruction to about 5-10% of students, and Tier 3 involving intensive individualized support for about 1-5% of students. Aggregating and analyzing assessment data at the classroom level is key to guiding instructional improvements and identifying learning disabilities among ELL students.