This study investigates the relation between review spacing and question format on student retention. Participants in an 8th grade Georgia Studies class reviewed previously learned material either in one sitting (massed review) or in multiple sessions (spaced review). Following the review, each participant answered questions either in multiple…

Ninety-six first grade students in an urban school system were tested in October and May on reading, mathematics, and their understanding of sequences of letters and numbers. A time lag analysis was subsequently conducted. In such analyses, cross-correlations between the first measurement of one variable and the second measurement of another are…

The spacing effect is a ubiquitous phenomenon, whereby memory is enhanced for the information that is learned across different points in time rather than being learned at once. A considerable amount of research has focused on the nature of the spacing effect, and there is general acceptance that spacing learning events out in time promotes…

This article examines the effect of improvements in timing/rhythmicity on mathematics achievement. A total of 86 participants attending 1st through 4th grades completed pre- and posttest measures of mathematics achievement from the Woodcock-Johnson III Tests of Achievement. Students in the experimental group participated in a 4-week intervention…

In this paper, we examine the validity and precision of two nonexperimental study designs (NXDs) that can be used in educational evaluation: the comparative interrupted time series (CITS) design and the difference-in-difference (DD) design. In a CITS design, program impacts are evaluated by looking at whether the treatment group deviates from its…

This report presents estimates from a large-scale, multi-district RCT (randomized controlled trial) on the effectiveness of a summer reading program on improving student reading comprehension for economically disadvantaged grade 3 students reading below the 50th percentile nationally. This study focused on the summer between grades 3 and 4 for…

This study investigates the effects of two factors: the mode of problem-solving instruction (i.e. Web-based versus non-Web-based) and the level of academic achievement (i.e. high achievers versus low achievers) on students' problem-solving ability and biology achievement. A quasi-experimental design was used, in which the experimental group…

The purpose of this study was to examine the technical adequacy of a computer-based assessment instrument which is based on hierarchical models of text comprehension for monitoring student reading progress following the Curriculum-Based Measurement (CBM) approach. At intervals of two weeks, 120 third-grade students finished eight CBM tests. To…

A formative intervention was employed to expose children to a variety of words to increase the breadth, or size of their vocabularies, and to repeatedly and supportively expose children to words to increase the depth, or semantic understanding of vocabulary. Science content words were selected since they are less likely to be included in an…