This document discusses acceleration and developing effective intervention practices to support student progress. It defines acceleration as faster-than-expected progress that allows a student to catch up to or exceed benchmarks. It addresses implementing systems of student support, monitoring progress, and developing curriculum and achievement plans. A curriculum and achievement plan brings together assessment, outcomes, and supplementary supports to plan for accountability and focus on effective strategies. The document provides examples of curriculum and achievement plan elements and evaluating their impact. It asks how schools can appropriately choose cost-effective interventions to improve literacy achievement for students below expectations.