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Also, each of these features can vary along a continuum making them easier or more challenging for schools to implement. What is unclear is if implementing very intensive interventions early in school (first grade), which require significantly more school resources, provides accordingly accelerated student learning. This article investigates the role of intensifying instructional time for the most at-risk first graders in schools implementing research-based instructional and assessment practices within multitiered instructional support systems. Results indicate that students receiving more intensive intervention made significantly more progress across a range of early reading measures. Intervention features, limitations, recommendations for practice, and implications for treatment resisters are discussed.<\/jats:p>","DOI":"10.1177\/0022219407313586","type":"journal-article","created":{"date-parts":[[2008,2,19]],"date-time":"2008-02-19T18:43:19Z","timestamp":1203446599000},"page":"115-125","source":"Crossref","is-referenced-by-count":51,"title":["Intensifying Instruction"],"prefix":"10.1177","volume":"41","author":[{"given":"Beth A.","family":"Harn","sequence":"first","affiliation":[{"name":"University of Oregon, Eugene,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sylvia","family":"Linan-Thompson","sequence":"additional","affiliation":[{"name":"University of Texas at Austin"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gregory","family":"Roberts","sequence":"additional","affiliation":[{"name":"University of Texas at Austin"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2008,4,1]]},"reference":[{"key":"atypb1","doi-asserted-by":"publisher","DOI":"10.1177\/07419325020230050501"},{"key":"atypb2","doi-asserted-by":"publisher","DOI":"10.1177\/00222194060390050401"},{"key":"atypb3","doi-asserted-by":"publisher","DOI":"10.1207\/s15327035ex1304_2"},{"key":"atypb4","volume-title":"Paper presented at the Annual Meeting of the National Council on Teaching Mathematics","author":"Berliner, D.C."},{"key":"atypb5","volume-title":"Strategies for teaching students with learning and behavior problems","author":"Bos, C.S.","year":"2002","edition":"5"},{"key":"atypb6","volume-title":"Guided, cooperative learning and individual knowledge acquisition (Technical Report No. 372)","author":"Brown, A.L.","year":"1986"},{"key":"atypb7","first-page":"9","volume":"2","author":"Cavanaugh, C.L.","year":"2004","journal-title":"Learning Disabilities"},{"key":"atypb8","volume-title":"CIRCUITS: Center for improving reading competence using intensive treatments school-wide","author":"Chard, D."},{"key":"atypb9","volume-title":"Statistical power analysis for the behavioral sciences","author":"Cohen, J.","year":"1988","edition":"2"},{"key":"atypb10","doi-asserted-by":"publisher","DOI":"10.1177\/00222194040370020101"},{"key":"atypb11","first-page":"8","volume":"22","author":"Cunningham, A.E.","year":"1998","journal-title":"American Educator"},{"key":"atypb12","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.92.4.605"},{"key":"atypb13","unstructured":"Engelmann, S. 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