We examined the effectiveness of a researcher-provided reading intervention with 484 fourth graders with significant reading difficulties. Students were randomly assigned to one year of intervention, two years of intervention, or a business-as-usual comparison condition (BAU). Students assigned to two years of intervention demonstrated…

With an increasing percentage of schools moving toward approaches to data-based instructional problem-solving and early remediation of learning difficulties, the development and execution of intervention plans often warrants the pragmatic question: How intensive should an intervention be so that it is effective, while also feasible and time…