Across multiple schools and sites, the impact of grade-at-intervention was evaluated for children at risk or meeting criteria for reading disabilities. A multiple-component reading intervention with demonstrated efficacy was offered to small groups of children in 1st, 2nd, or 3rd grade. In a quasi-experimental design, 172 children received the…

The purpose of the study was to determine whether individual differences in at-risk 4th graders' language comprehension, nonverbal reasoning, concept formation, working memory, and use of decimal labels (i.e., place value, point, incorrect place value, incorrect fraction, or whole number) are related to their decimal magnitude understanding.…

This study examines the relationship between IQ and yearly academic growth rate in reading and mathematics for low income children in the primary grades involved in the Direct Instruction Follow Through program (DIFT). Low income children, from 20 communities in the United States, who engaged in the DIFT program between 1969 and 1977 for either 3…