This study employed a cluster randomized trial design to evaluate the effectiveness of a research-based intervention for improving the mathematics education of very young children. This intervention includes the Building Blocks mathematics curriculum, which is structured in research-based learning trajectories, and congruous professional development emphasizing teaching for understanding via learning trajectories and technology. A total of 42 schools serving low-resource communities were randomly selected and randomly assigned to 3 treatment groups using a randomized block design involving 1,375 preschoolers in 106 classrooms. Teachers implemented the intervention with adequate fidelity. Pre- to posttest scores revealed that the children in the Building Blocks group learned more mathematics than the children in the control group (effect size, g = 0.72). Specific components of a measure of the quantity and quality of classroom mathematics environments and teaching partially mediated the treatment effect.

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The present study assessed the compensatory effectiveness of four assistive software tools (speech synthesis, spellchecker, homophone tool, and dictionary) on literacy. Secondary- level students (N = 93) with reading difficulties completed computer-based tests of literacy skills. Training on their respective software followed for those assigned to the Assistive Software and the Microsoft Word Control groups. Posttests revealed an improvement for the Assistive Software group on reading comprehension, homophone error detection, spelling error detection, and word meanings. The Microsoft Word Control group also improved on spelling error detection and word meanings, but performed worse on homophone error detection. A Full Control group showed no significant improvements on any of the measures. Overall, results indicate a significant assistive value of the four software tools (from the software package Read & Write Gold, 2002) across several domains of literacy.

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There are systematic effects of maternal education and race on children's RBS-NA performance, which is important for both researchers and clinicians to take into account when using this instrument.