Quality of geometry instruction and its short-term impact on students' understanding of the Pythagorean Theorem

This article presents findings from a German–Swiss video-based classroom study. The research examines how three basic dimensions of instructional quality impact the development of students' understanding of the Pythagorean Theorem. The study sample comprised 19 German and 19 Swiss mathematics classes. A three-lesson introductory unit on the Pythagorean Theorem was videotaped in all classes. Multilevel analyses revealed both classroom management and cognitive activation to have positive effects on mathematics achievement. The results also provide empirical evidence that cognitive activation and a supportive climate moderate the relationship between mathematics-related interest and mathematics achievement.     

Examining teachers’ use of computer-based technologies: A case study

This paper presents a case study that illustrates the extent to which technology is used in and out of the classroom in the elementary schools of Turkey. The data were collected through interviews, observations and document analyses. The results show that teachers use technology for administrative purposes, technology education, non-educational purposes, instructional preparation, teacher-directed instructional delivery, student homework and instructional assessment. This study further reveals that teachers’ use of technology is very limited. If teachers use technology for instruction, it is almost always to support their traditional teaching methods.     

How to make a bad speech

This essay is an attempt to facilitate the search for a new paradigm to help guide and organize research. Inadequacies in the philosophy of language underlying the classical and neo‐Aristotelian traditions are explained; a set of propositions that offers a more adequate philosophy of language is developed; a controversy among major modern theorists is illustrated; and selected recommendations of The Prospect of Rhetoric are assessed.     

Alterations in neuromuscular activation patterns associated with walking in short-leg walking boots

BackgroundShort-leg walking boots are a common intervention for acute and chronic lower extremity injury. Few studies have examined the neuromuscular adaptations associated with short-leg walking boots and no previous study has investigated timing characteristics of muscle activation during gait. The purpose of the current study was to examine the timing and amplitudes of muscle activation of the extrinsic ankle musculature during walking in two types of short-leg walking boots.MethodsEleven healthy young adults performed five level walking trials at a self-selected pace in each of three conditions: normal walking, Gait Walker and Equalizer short-leg walking boots. Ground reaction forces were collected from a force platform while surface electromyography (EMG) was collected from the tibialis anterior, peroneus longus and medial gastrocnemius. EMG signals were rectified and smoothed using the root mean squared with a 20-ms smoothing window and were normalized to the largest mean of the normal walking trials. A repeated measures analysis of variance was used to assess the effect of short-leg walking boots on the onset, duration and amplitude of muscle activation.ResultsShort-leg walking boots were generally associated with earlier onsets of muscle activation and longer durations of muscle activation. However, there was no reduction in EMG amplitude.ConclusionThe findings of this study show that the induced alterations in muscle activation patterns may limit the short-leg walking boots.     

Video game–based learning: An emerging paradigm for instruction

Interactive digital media, or video games, are a powerful new medium. They offer immersive experiences in which players solve problems. Players learn more than just facts—ways of seeing and understanding problems so that they “become” different kinds of people. “Serious games” coming from business strategy, advergaming, and entertainment gaming embody these features and point to a future paradigm for eLearning. Building on interviews with leading designers of serious games, this article presents case studies of three organizations building serious games, coming from different perspectives but arriving at similar conclusions. This article argues that such games challenge us to rethink the role of information, tools, and aesthetics in a digital age.     

Using Standard-Setting Data to Establish Cutoff Scores

Is it enough to run the standard-setting panel and to stop? Once a panel has met or a contrasting group experiment has been conducted, do we have a cutoff score? On what basis might a proposed cutoff score be adjusted? Who should make the adjustment decision?