An appropriate estimate of statistical power is critical for the design of intervention studies. Although the inclusion of a pretest covariate in the test of the primary outcome can increase statistical power, samples selected on the basis of pretest performance may demonstrate range restriction on the selection measure and other correlated…

Entertainment-education has proved to be an engaging medium through which to explore health and social issues in populations. Given the popularity of the zombie theme in popular culture it is no surprise therefore that the Centers for Disease Control and Prevention adopted this theme in an effort to engage youth and young adults in emergency…

As part of the 2010 economic stimulus, a $55 million "Investing in Innovation" (i3) grant from the US Department of Education was awarded to scale up Reading Recovery across the nation. This paper presents the final round of results from the large-scale, mixed methods randomized evaluation of the implementation and impacts of Reading…

Response to Intervention (RTI) is a targeted programme that uses a tiered approach to identify the needs of low achieving pupils. The approach begins with whole class teaching (Tier 1), followed by small group tuition (Tier 2) for those who need more attention, and one to one tutoring (Tier 3) for those who do not respond to the small group…