This document discusses progress monitoring and assessment of culturally and linguistically diverse (CLD) learners. It emphasizes that assessment should measure progress rather than achievement and prevention of learning difficulties. Response to Intervention (RTI) uses frequent assessments of at-risk students to determine if interventions are effective. Student progress is monitored regularly and data is used to adjust interventions, materials, frequency, duration, group size, or instructor as needed. The document provides examples of tiered progress monitoring cycles within RTI and recommends accommodations for CLD learners such as use of native language, expanded time, peer-appropriate goals, and local norms when assessing progress.