When causal inferences are to be synthesized across multiple studies, efforts to establish the magnitude of a causal effect should be balanced by an effort to evaluate the generalizability of the effect. The evaluation of generalizability depends on two factors that are given little attention in current syntheses: construct validity and external…

This report examines a decade's worth of research on school vouchers and concludes that vouchers have had no clear positive effect on student academic achievement, and mixed outcomes for students overall. Effects on graduation rates, parental satisfaction, public school achievement and cost to taxpayers are discussed. The report also notes that…

This paper synthesizes four research projects the authors completed between 2006-2011. The first research study was a case study of leadership in five highly-effective elementary schools in Alberta. Second, we thoroughly reviewed literature in the area of "Student Engagement." Our third research project included 50+ interviews compiling…

The trends and findings from a descriptive analysis of 25 years of research studies examining the effectiveness of technology to support the compositional writing of students with learning and academic disabilities are presented. A corpus of 85 applied research studies of writing technology effectiveness was identified from among 249 items in the…

Under the George W. Bush U.S. presidential administration, the federal government pushed for greater accountability among institutions of higher education for educational outcomes. Graduation rate is a key performance indicator of institutional accountability. Previous researchers of student attrition focused primarily on the effects of student…

A research synthesis was conducted including three meta analyses, a review of the relevant literature, and supplemental analyses examining the relationship between personal faith and the reduction of the achievement gap. Personal faith included belief and adherence to any religion. The results of the three meta-analyses indicated that: (a)…

Presents a synthesis of the nominal categories model of R. Bock (1972) and the choice model for mixed-effects analysis of rank-ordered data by R. Luce (1959). Shows that the proposed ranking model is both parsimonious and flexible in accounting for preference heterogeneity as well as fixed and random effects of covariates. Discusses relationships…

The educational achievement and attainment of young people in the United States has been a long-standing issue of concern. While analyses of long-term trend data from the National Assessment of Educational Progress (NAEP) show that students in the United States have made gains in reading and mathematics over the past few decades, a sizeable…

In this experiment, linear polyynes are synthesized and then the predictions of a one-dimensional, particle in a box are used to calculate the quantum mechanical box length for the polyynes. A solution of graphite in ethanol is irradiated with a Nd:YAG laser (532 nm) and the resulting solution is filtered and analyzed. Data from gas…

This response to Slavin's article (2008) explores the issues of transparency, representation, and warranting of claims in Slavin's descriptions of the work of others and his suggestions for program evaluation syntheses. Through contrastive analyses between Slavin's representations of the program evaluation synthesis efforts of five organizations…

Background: Expeditionary Learning Schools opens and transforms K-12 schools. Through engaging, long-term interdisciplinary projects designed to achieve academic standards and an emphasis on a healthy school culture, Expeditionary Learning aims to develop students who are not only high-achieving but also highly motivated to do challenging…

The 2001 renewal of the United States' Title I program instituted the Supplemental Educational Services (SES) program, in which schools in their third year of failing to make Adequate Yearly Progress (AYP) are required to offer out-of-school-time tutoring in core subjects to low-income students. This study synthesized provider effects reported in…

If higher education is a right, and distance education is the avenue for making higher education universally available, then who shall pay? This article asks (1) can state governments in the United States afford to fund this initiative and (2) can public higher education institutions in the U.S. fund this effort through capitalizing on…

Science is a social process--one that involves particular ways of talking, reasoning, observing, analyzing, and writing, which often have meaning only when shared within the scientific community. Discussions are one of the best ways to help students learn to "talk science" and construct understanding in a social context. Since inquiry is an…

Le Chatelier's principle states that the further addition of a particular component will cause the reaction to shift in the direction that reduces the total number of moles of the system. However, the addition of one reactant [N[subscript 2]] as in the ammonia synthesis reaction may cause the reaction to proceed in a direction that produces more…