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排序方式: 共有419条查询结果,搜索用时 31 毫秒
91.
92.
This experimental study reports findings on the effects from a year-long reading intervention providing daily, 50-minute sessions to middle-school students with identified learning disabilities (n = 65) compared with similar students who did not receive the reading intervention (n = 55). All students continued to receive their special education services as provided by the school. Results indicated statistically significant findings favoring the treatment group for sight word reading fluency following intervention. Small effects were found for phonemic decoding fluency and passage comprehension. No other statistically significant differences were noted between groups. The findings suggest that while gains on word reading fluency resulted from the additional reading treatment, accelerating the reading performance of students identified with learning disabilities may be unlikely to result from a one-year, daily intervention provided to students in groups of 10-15. 相似文献
93.
The importance of “size and scale” in nanoscience and engineering has been recognized by both scientists and science educators. A solid understanding of this concept is key to the learning of nanoscience. Students, however, have been reported to have considerable difficulty grasping this concept; yet little is known regarding their state of understanding. To address this knowledge gap, we conducted a series of studies that were aimed at exploring the different ways students conceive of “size and scale” in the context of undergraduate nanoscience and engineering courses. Informed by Variation Theory of Learning (Marton and Booth, 1997), we identified four major categories (with two sub‐categories within each) of student conception—fragmented, linear, proportional, and logarithmic. These conception categories, together with the aspects of variation that characterize and distinguish them, are summarized in a typology. In addition to serving as a diagnostic tool to describe students' understanding, this typology can also be used to guide the development of instructional interventions that facilitate students to move toward a more sophisticated understanding of “size and scale.” © 2011 Wiley Periodicals, Inc., Inc. J Res Sci Teach 48: 512–533, 2011 相似文献
94.
Greg Thompson James Bell 《Discourse: Studies in the Cultural Politics of Education》2011,32(3):399-413
Quiet students are a feature of the organisation of secondary schools. Using qualitative methods and Deleuzean conceptualisations of modern subjectivity, this paper explores the ways that quiet students negotiate the terrain of their school. These negotiations often seem to produce a self that is trapped rather than a subject who seizes opportunities to be inventive, creative and experimental of their self. Understanding the faciality of quiet students provides opportunities to advance debate on how schools could encourage freer selves. 相似文献
95.
Nikolic-Jaric M Romanuik SF Ferrier GA Cabel T Salimi E Levin DB Bridges GE Thomson DJ 《Biomicrofluidics》2012,6(2):24117-2411715
Dielectric particles flowing through a microfluidic channel over a set of coplanar electrodes can be simultaneously capacitively detected and dielectrophoretically (DEP) actuated when the high (1.45 GHz) and low (100 kHz–20 MHz) frequency electromagnetic fields are concurrently applied through the same set of electrodes. Assuming a simple model in which the only forces acting upon the particles are apparent gravity, hydrodynamic lift, DEP force, and fluid drag, actuated particle trajectories can be obtained as numerical solutions of the equations of motion. Numerically calculated changes of particle elevations resulting from the actuation simulated in this way agree with the corresponding elevation changes estimated from the electronic signatures generated by the experimentally actuated particles. This verifies the model and confirms the correlation between the DEP force and the electronic signature profile. It follows that the electronic signatures can be used to quantify the actuation that the dielectric particle experiences as it traverses the electrode region. Using this principle, particles with different dielectric properties can be effectively identified based exclusively on their signature profile. This approach was used to differentiate viable from non-viable yeast cells (Saccharomyces cerevisiae). 相似文献
96.
The relative effects of group size on reading progress of older students with reading difficulties 总被引:1,自引:0,他引:1
Vaughn S Wanzek J Wexler J Barth A Cirino PT Fletcher J Romain M Denton CA Roberts G Francis D 《Reading and writing》2010,23(8):931-956
This study reports findings on the relative effects from a yearlong secondary intervention contrasting large-group, small-group,
and school-provided interventions emphasizing word study, vocabulary development, fluency, and comprehension with seventh-
and eighth-graders with reading difficulties. Findings indicate that few statistically significant results or clinically significant
gains were associated with group size or intervention. Findings also indicate that a significant acceleration of reading outcomes
for seventh- and eighth-graders from high-poverty schools is unlikely to result from a 50 min daily class. Instead, the findings
indicate, achieving this outcome will require more comprehensive models including more extensive intervention (e.g., more
time, even smaller groups), interventions that are longer in duration (multiple years), and interventions that vary in emphasis
based on specific students’ needs (e.g., increased focus on comprehension or word study). 相似文献
97.
Anthony Kelly Christopher Downey 《Educational Assessment, Evaluation and Accountability》2010,22(3):181-198
Value-added measures can be used to allocate funding to schools, to identify those institutions in need of special attention
and to underpin government guidance on targets. In England, there has been a tendency to include in these measures an ever-greater
number of contextualising variables and to develop ever-more complex models that encourage (or ‘impose’) in schools a single
uniform method of analysing data, but whose intricacies are not fully understood by practitioners. The competing claims of
robustness, usability and accessibility remain unresolved because it is unclear whether the purpose of the measurement is
teacher accountability, pupil predictability or school improvement. This paper discusses the provenance and shortcomings of
value-added measurement in England (and the Pupil Level Annual Schools Census that informs it) including the fact that although
the metrics are essential for School Effectiveness Research, they fail to capture in its entirety the differential effectiveness
of schools across the prior attainment range and across sub-groups of students and subjects. 相似文献
98.
Web‐based peer‐review systems are ubiquitous within scholarly publishing today, providing valuable efficiencies for authors, editors, and referees. These systems are the result of a general evolution from paper‐based workflows to electronic processes that began in the 1970s. DOS‐based systems paved the way for Windows desktop systems and, in the mid‐1990s, Web‐based peer review. Governmental, academic, and commercial stakeholders all participated in advancing the state of peer review by experimenting with different technologies, workflows, and features. These experiments have coalesced into a new steady state in which Web‐based peer‐review systems are the norm, and in which continued evolution tends to focus on incremental improvements to traditional workflow. 相似文献
99.
Lucas SJ Anglem N Roberts WS Anson JG Palmer CD Walker RJ Cook CJ Cotter JD 《Journal of sports sciences》2008,26(5):477-489
The aim of this study was to determine the magnitude and pattern of intensity, and physiological strain, of competitive exercise performed across several days, as in adventure racing. Data were obtained from three teams of four athletes (7 males, 5 females; mean age 36 years, s = 11; cycling .VO(2 peak) 53.9 ml . kg(-1) . min(-1), s = 6.3) in an international race (2003 Southern Traverse; 96 - 116 h). Heart rates (HR) averaged 64% (95% confidence interval: +/- 4%) of heart rate range [%HRR = (HR - HR(min))/(HR(max) - HR(min)) x 100] during the first 12 h of racing, fell to 41% (+/-4%) by 24 h, and remained so thereafter. The level and pattern of heart rate were similar across teams, despite one leading and one trailing all other teams. Core temperature remained between 36.0 and 39.2 degrees C despite widely varying thermal stress. Venous samples, obtained before, during, and after the race, revealed increased neutrophil, monocyte and lymphocyte concentrations (P < 0.01), and increased plasma volume (25 +/- 10%; P < 0.01) with a stable sodium concentration. Standardized exercise tests, performed pre and post race, showed little change in the heart rate-work rate relationship (P = 0.53), but a higher perception of effort post race (P < 0.01). These results provide the first comprehensive report of physiological strain associated with adventure racing. 相似文献
100.
The aim of this study was to examine acute physiological responses and time-motion characteristics associated with three different small-sided soccer game formats in youth players. Sixteen male soccer players aged 16.3+/-0.6 years (mean+/-s) completed three variations of a small-sided game (i.e. 2 vs. 2, 4 vs. 4, and 6 vs. 6 players) in which heart rate, rating of perceived exertion (RPE), blood lactate concentration, and time-motion characteristics were recorded. The pitch size was altered to keep the relative pitch area per player consistent for each game format. The 2 vs. 2 games exhibited greater blood lactate, heart rate, and RPE responses compared with 4 vs. 4 and 6 vs. 6 games (P<0.05). The players travelled less (P<0.05) distance at speeds of 0-7 km.h(-1) in the 4 vs. 4 compared with the 2 vs. 2 games (1128+/-10 m and 1176+/-8 m, respectively). Average maximal sprint distances above 18 km.h(-1) were lower (P<0.05) in 2 vs. 2 than in 4 vs. 4 and 6 vs. 6 games (11.5+/-3.9 m, 15.3+/-5.5 m, and 19.4+/-5.9 m, respectively), and in 4 vs. 4 compared with 6 vs. 6 games. The results show that as small-sided game formats decrease in size and relative pitch area remains constant, overall physiological and perceptual workload increases. 相似文献