Mixed-method pre-cooling reduces physiological demand without improving performance of medium-fast bowling in the heat

This study examined physiological and performance effects of pre-cooling on medium-fast bowling in the heat. Ten, medium-fast bowlers completed two randomised trials involving either cooling (mixed-methods) or control (no cooling) interventions before a 6-over bowling spell in 31.9±2.1°C and 63.5±9.3% relative humidity. Measures included bowling performance (ball speed, accuracy and run-up speeds), physical characteristics (global positioning system monitoring and counter-movement jump height), physiological (heart rate, core temperature, skin temperature and sweat loss), biochemical (serum concentrations of damage, stress and inflammation) and perceptual variables (perceived exertion and thermal sensation). Mean ball speed (114.5±7.1 vs. 114.1±7.2 km · h(-1); P = 0.63; d = 0.09), accuracy (43.1±10.6 vs. 44.2±12.5 AU; P = 0.76; d = 0.14) and total run-up speed (19.1±4.1 vs. 19.3±3.8 km · h(-1); P = 0.66; d = 0.06) did not differ between pre-cooling and control respectively; however 20-m sprint speed between overs was 5.9±7.3% greater at Over 4 after pre-cooling (P = 0.03; d = 0.75). Pre-cooling reduced skin temperature after the intervention period (P = 0.006; d = 2.28), core temperature and pre-over heart rates throughout (P = 0.01-0.04; d = 0.96-1.74) and sweat loss by 0.4±0.3 kg (P = 0.01; d = 0.34). Mean rating of perceived exertion and thermal sensation were lower during pre-cooling trials (P = 0.004-0.03; d = 0.77-3.13). Despite no observed improvement in bowling performance, pre-cooling maintained between-over sprint speeds and blunted physiological and perceptual demands to ease the thermoregulatory demands of medium-fast bowling in hot conditions.     

La enseñanza de contenidos específicos en matemáticas

¿Matemáticas para todos o matemáticas de élite? ¿Lenguaje matemático o matemática aplicada? En la base de las últimas reformas educativas de todo el mundo no dejan de estar presentes dilemas, reales unas veces, ficticios otras, que tienen mucho que ver con los supuestos políticos—ideológicos—que sustenten los diseñadores de esa reforma respecto al papel de la educación y a los que no se sustrae la enseñanza de las matemáticas…     

Children's Developing Mathematics in Collective Practices: A Framework for Analysis

This article presents a cultural-developmental framework for the analysis of children's mathematics in collective practices and illustrates the heuristic value of the framework through the analysis of videotaped episodes drawn from a middle-school classroom. The framework is presented in 2 related parts. The first targets the children's emerging mathematical goals in collective practices, with a particular focus on the complex role that artifacts play in children's emerging goals. The second part focuses on children's developing mathematics that takes form in their goal-directed activities: (a) Microgenetic analyses concern the process whereby children structure cultural forms like artifacts to serve particular functions as they accomplish emerging mathematical goals; (b) sociogenetic analyses concern the spread or travel of mathematical forms and associated functions within a community of individuals; and (c) ontogenetic analyses concern the interplay between the forms that children use and the functions that they serve over the course of children's development. The analyses of the classroom episodes points to the promise (and limitations) of the framework as a method for furthering our understanding of the interplay between social and developmental processes in children's mathematics.     

Creating a Teaching and Learning Environment in Criminal Justice Courses that Promotes Higher Order Thinking∗

Active learning techniques have long been shown to increase the extent to which students are able to think critically about problems and solutions to them. The extant research suggests that efforts to engage students in higher order thinking should extend beyond the typical setting in which the more advanced students are introduced to active learning techniques. White and Frederiksen (2000 White, B. Y. and Frederiksen, J. R. 2000. “Metacognitive Facilitation: An Approach To Making Scientific Inquiry Accessible to All.”. In Inquiry into Learning and Teaching in Science, Edited by: Minstrell, J. L. and Van‐Zee, E. H. 331–70. Washington, DC: American Association for the Advancement of Science.  [Google Scholar]) have found that most students, regardless of achievement levels, can reach a higher order thinking level when they are encouraged to do so. This paper explores several issues associated with active learning techniques in the general sense and then uses examples to demonstrate how such techniques can and are being used on the criminal justice classroom. The pros and cons of using active learning techniques are also discussed.     

Considerations for Faculty Preparing to Develop and Teach Online Criminal Justice Courses at Traditional Institutions of Higher Learning

Criminal justice programs at traditional institutions of higher learning have been moving toward offering courses online and, in some cases, placing entire programs online for the better part of the past decade. In competition with for‐profit institutions, many traditional colleges and universities have expanded their distance education programming to include online courses and programs to attract students. As a result, the number of criminal justice students has increased, as have the profits for home institutions. With this growth in the online education market, the criminal justice faculty member has been thrust, willingly or unwillingly, into the world of online teaching—a method of instruction foreign to many instructors. From the authors’ experience at their current (and in the case of the lead author a second) institution, this paper addresses many issues that must be considered by faculty members before embarking on this type of time‐intensive initiative.     

Title I: The Evolving Research Base

For the past 35 years, Title I of the Elementary and Secondary Education Act has been the largest and most important federal resource for reforming high-poverty schools. Drawing on recent research, this article documents what we know about Title I's overall effectiveness and discusses how it may become a more effective intervention. The author concludes by making 3 policy recommendations for fostering better research and better programs: implement a rigorous and uniform national accountability system; support continued research and development of replicable programs and methods for improving schooling for disadvantaged children; and encourage large-scale randomized experiments of promising programs and practices.     

Student and Teacher Outcomes of The Superkids Quasi-Experimental Study

In this article, we report kindergarten student and teacher outcomes from a quasi-experimental evaluation of The Superkids, a systematic, phonics-based, comprehensive K-2 reading program. We recruited 23 kindergarten teachers to implement The Superkids program from a diverse, yet predominantly ethnic minority, group of classrooms from across the United States. We then employed a precise computerized matching methodology to derive a statistically equivalent comparison group of 20 control teachers who implemented their standard “business as usual” core literacy program. Multilevel analyses of classroom-level effects of The Superkids revealed achievement advantages of more than 1/10 of a standard deviation, d = 0.11, to 1/4 of a standard deviation, d = 0.25, for the treatment group on the 5 subtests from the Stanford Achievement Test, 10th edition (SAT-10). Four measures of teachers’ self-reported satisfaction with the core reading program used in their classrooms also revealed statistically significant advantages for Superkids of nearly three-quarters of a standard deviation, d = 0.72, to nearly 1½ standard deviation units, d = 1.49.     

Library Space Redesign and Student Computing

Academic libraries are spending considerable time and study on redesigning spaces. The use of technology is often an important part of these redesigned spaces. The space redesign goals at F.D. Bluford Library focus on creating open, activity-promoting, colorful spaces that are designed to be attractive to students. The goals also focus on implementing hybrid spaces that allow students to work alone or in groups, with support for mobile technologies like laptops or tablets. The space redesign goals focus on upgrading the quality of desktops available but reducing the number of desktops. This study examines the question “Does our library renovation significantly change computer use in the redesigned area?” Key findings include that, in defiance of expectations, there is no significant decrease in desktop usage despite the decreased number of computers. However, findings show there is a significant difference in tablet use, despite tablet-friendly spaces and charging options. Surprisingly, our students use fewer tablets. Laptop usage shows no significant difference. In summary, our research shows desktop computing—especially high-quality desktop computing—appears to still have a role in academic libraries even in the mobile technology age.