As students move beyond foundational decoding, many still require targeted support to develop vocabulary, fluency, and comprehension. IMSE's Morphology+ program meets this need through explicit, systematic instruction in prefixes, suffixes, and Latin and Greek roots. Designed for grades 3-5, the program uses multimodal strategies and embedded assessments to strengthen morphemic awareness and academic vocabulary. This document describes ESSA IV Evidence for the Morphology+ research base and includes a literature review, a logic model, and an overview of instructional features and professional development components.