© 2025 Vista Higher Learning Reading and Writing Growth with Vista’s Engage 7 Study Questions The study posed three questions to guide the collection of evidence in support of the e ectiveness of Engage. 1. Do grade 9–12 ML students receiving instruction incorporating Engage (treatment group) show significant growth in English reading and writing skills measured by the AZELLA (Arizona English Language Learner Assessment) over the course of a school year? What is the magnitude of the growth achieved? 2. Do ML boys and girls in grade 9–12 di er in their growth in English reading and writing skills (reflected on the AZELLA) when receiving instruction incorporating Engage? Do MLs of di erent ethnicity in grade 9–12 di er in their growth in English reading and writing skills (reflected on the AZELLA) when receiving instruction incorporating Engage? 3. Do academically at-risk ML students in grades 9–12 receiving Engage instruction show significant growth in reading and writing skills? How does the growth of at-risk students compare to the growth seen for the full sample of ML students in grades 9–12? The extent to which students receiving instruction incorporating Engage achieve significant growth in English reading and writing skills, and the fact that Engage appears equally e ective for subgroups of the population, are both evidence of e ectiveness.
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