Adapting to large-scale changes in Advanced Placement Biology,Chemistry, and Physics: the impact of online teacher communities     

Kim Frumin  Chris Dede  Christian Fischer  Brandon Foster  Frances Lawrenz  Arthur Eisenkraft 《International Journal of Science Education》2018,40(4):397-420

Over the past decade, the field of teacher professional learning has coalesced around core characteristics of high quality professional development experiences (e.g. Borko, Jacobs, & Koellner, 2010. Contemporary approaches to teacher professional development. In P. L. Peterson, E. Baker, & B. McGaw (Eds.), International encyclopedia of education (Vol. 7, pp. 548–556). Oxford: Elsevier.; Darling-Hammond, Hyler, & Gardner, 2017. Effective teacher professional development. Palo Alto, CA: Learning Policy Institute). Many countries have found these advances of great interest because of a desire to build teacher capacity in science education and across the full curriculum. This paper continues this progress by examining the role and impact of an online professional development community within the top-down, large-scale curriculum and assessment revision of Advanced Placement (AP) Biology, Chemistry, and Physics. This paper is part of a five-year, longitudinal, U.S. National Science Foundation–funded project to study the relative effectiveness of various types of professional development in enabling teachers to adapt to the revised AP course goals and exams. Of the many forms of professional development our research has examined, preliminary analyses indicated that participation in the College Board's online AP Teacher Community (APTC) – where teachers can discuss teaching strategies, share resources, and connect with each other – had positive, direct, and statistically significant association with teacher self-reported shifts in practice and with gains in student AP scores (Fishman et al., 2014). This study explored how usage of the online APTC might be useful to teachers and examined a more robust estimate of these effects. Findings from the experience of AP teachers may be valuable in supporting other large-scale curriculum changes, such as the U.S. Next Generation Science Standards or Common Core Standards, as well as parallel curricular shifts in other countries.  相似文献   

Wrestling     

Robert Newton  Brandon Doan  Michael Meese  Brian Conroy  Kevin Black  Wayne Sebstianelli 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):157-166

The purpose of this study was to determine whether there is a significant difference in the co‐efficient of friction (Fc) between old versus new wrestling shoes and mats and to investigate the effect of perspiration. Fc was measured by dragging a weighted shoe over a wrestling mat surface and measuring the vertical and horizontal forces produced. Three different shoe conditions were assessed over two mat types for both wet and dry conditions for a total of 12 conditions. To simulate the wet condition, saline solution was smeared over the surface of the mat. There was a significant effect of shoe, mat, and wet/dry conditions. In addition, significant interactions of shoe by mat, shoe by dry/wet, and mat by dry/wet were observed. Overall, Fc was 36% higher for the new wrestling mat compared to the old wrestling mat. Application of the saline solution reduced Fc by 14% compared to the dry condition. Comparison of the mean Fc for all three shoe types revealed the Fc for the older design shoe was 23% to 28% lower than the brand new shoe and the worn newer design, respectively. A high Fc, such as in the new mat/new shoe combination, has the potential to increase the risk of knee and ankle injuries by fixing the foot more securely to the ground.  相似文献   

Library as the Technology Hub for the Health Sciences     

Brandon Patterson  Tallie Casucci  Bryan Elias Hull  Nancy T. Lombardo 《Medical reference services quarterly》2013,32(4):341-356

Abstract

Academic health sciences libraries have an important role in facilitating the use of technology in health sciences curricula. Serving as a technology hub, the library supports, advocates, and provides access to new technologies. The library introduces many faculty and students to new technology tools, techniques, and equipment for new multimedia creation. As the technology hub grows and expands, library personnel can provide expertise, which demonstrates the library's value in leading the exploration of new technology, including Do-It-Yourself multimedia tools, virtual reality, virtual anatomy, and 3D printing.  相似文献   

The Single Sex Debate for Girls in Science: a Comparison Between Two Informal Science Programs on Middle School Students’ STEM Identity Formation   总被引：1，自引：0，他引：1  

Roxanne M. Hughes  Brandon Nzekwe  Kristen J. Molyneaux 《Research in Science Education》2013,43(5):1979-2007

Currently, there are policy debates regarding the efficacy and legality of single sex formal and informal education programs. This issue is particularly poignant in science education due to the historical marginalization of women in these fields. This marginalization has resulted in women being positioned as a stigmatized group within many science, technology, engineering, and mathematics (STEM) related fields. Research points to adolescence as the age where this sense of marginalization begins to develop. As a result, policy responses have utilized various frameworks such as: increased access for women, changing pedagogy to address women’s learning styles, changing the language and culture of science to prevent marginalization of stigmatized groups, and finally exploring the role that individual identity plays in the marginalization of women. This study adds to the policy debate as it applies to single sex education by comparing middle school participants’ STEM identity formation during two informal science learning environments (an all girls’ STEM camp and a co-educational STEM camp). Additionally, this study focuses on the influence of camp activities within two informal science education programs: particularly the provision of role models and authentic STEM research activities, as means to improve STEM identity and make these fields relevant to the lives of middle school students. The results indicate that both camps improved girls’ STEM identities. These findings suggest that the single sex environment is not as important to STEM identity as the pedagogy used within the program.  相似文献   

A Review of “Growing Up Christian: A Congregational Strategy for Nurturing Disciples”     

Aaron Coleman  Brandon Johnson  Andy Rogers 《Religious education (Chicago, Ill.)》2013,108(3):343-344

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Buddy up: the Köhler effect applied to health games     

Feltz DL  Kerr NL  Irwin BC 《运动与训练心理学杂志》2011,33(4):506-526

The present investigation examined the K?hler motivation gain effect in a health game using an absent partner, presented virtually. The K?hler effect occurs when an inferior team member performs a difficult task better in a team or coaction situation than one would expect from knowledge of his or her individual performance. The effect has been strongest in conjunctive task conditions in which the group's potential productivity is equal to the productivity of its least capable member. Participants were randomly assigned to one of four conditions (individual control, coaction, additive, and conjunctive) in a 4 (conditions) ? 2 (gender) factorial design and performed a series of isometric plank exercises within an exercise game. They performed the first series of five exercises alone holding each position for as long as they could, and, after a rest period, those in the partner conditions were told they would do remaining trials with a same-sex virtual partner whom they could observe during their performance. The partner's performance was manipulated to be always superior to the participant's. Results showed that task persistence was significantly greater in all experimental conditions than in the individual control condition. The conjunctive condition was no more motivating than either the additive or coactive conditions. Results suggest that working out with virtually present, superior partners can improve persistence motivation on exercise game tasks.  相似文献   

On-chip collection of particles and cells by AC electroosmotic pumping and dielectrophoresis using asymmetric microelectrodes     

Melvin EM  Moore BR  Gilchrist KH  Grego S  Velev OD 《Biomicrofluidics》2011,5(3):34113-3411317

The recent development of microfluidic "lab on a chip" devices requiring sample sizes <100 μL has given rise to the need to concentrate dilute samples and trap analytes, especially for surface-based detection techniques. We demonstrate a particle collection device capable of concentrating micron-sized particles in a predetermined area by combining AC electroosmosis (ACEO) and dielectrophoresis (DEP). The planar asymmetric electrode pattern uses ACEO pumping to induce equal, quadrilateral flow directed towards a stagnant region in the center of the device. A number of system parameters affecting particle collection efficiency were investigated including electrode and gap width, chamber height, applied potential and frequency, and number of repeating electrode pairs and electrode geometry. The robustness of the on-chip collection design was evaluated against varying electrolyte concentrations, particle types, and particle sizes. These devices are amenable to integration with a variety of detection techniques such as optical evanescent waveguide sensing.  相似文献   

Destabilising equilibriums: harnessing the power of disruption in participatory action research     

Tina Cook  Toby Brandon  Maryam Zonouzi  Louise Thomson 《Educational Action Research》2019,27(3):379-395

ABSTRACT

This article draws on insights gained from three projects described as participatory action research (PAR) undertaken in the UK. What binds them together is that each project coordinator raised the issue of the under-representation of opportunities for disruption in the possible trajectory to knowledge democracy.

PAR places a relational process at the centre of the research practice. It brings together people with varied knowledges, perspectives and experiences and aspires to be a non-hierarchical, relational, collaborative endeavour. This challenges the traditional hierarchical hegemony of the external expert in research situations. Bringing people together does not, however, equate to shared agency, authentic participation and knowledge democracy. For different knowledges to be created previous knowledges need to be disrupted.The argument raised in this paper is that a neglected element of PAR has been the deliberate intent to nurture disruption within communicative spaces in relationally based engagements. It is posited that the disruption of beliefs and assumptions that underpin local actions, is an important enabler of other voices and knowledges being recognised and acted upon. The three projects described reveal how and why the harnessing of power through disruption contributes to creating a functional knowledge democracy for more radical change.  相似文献   

在图像处理上做高性能离散傅立叶变换     

Naga Govindaraju  Brandon Lloyd 《中国教育网络》2009,(1):30-30

我们介绍了一种利用高性能GPU来进行傅立叶变换的算法,包括级联式混合维数数FFT算法,无论是2的次幂大小或非2的次幂大小的。我们的级联式嘴法采用Stocldaam公式有效地利用了GPU的共享内存。我们通过把装置转换成基于块的多肿算法从而减小了内存装置的开销。对于非2次幂大小的情况,我们综合利用了小质数混合基FFr和Bluestein算法。  相似文献   

Culturally Embedded Measurement of Latino Caregivers’ Engagement in Head Start: A Tale of Two Forms of Engagement     

Christine McWayne  Brandon Foster  Gigliana Melzi 《Early education and development》2018,29(4):540-562

Practice and Policy: The preschool years represent a critical time to foster family engagement in education for children growing up in poverty. Yet the ways in which Latino families with lower levels of income engage with their children’s education at home and at school might look different from how middle-income parents from the dominant U.S. culture do, depending on cultural values and beliefs about best ways to support children’s learning as well as on socioeconomic realities that present barriers for traditional forms of engagement. This study sought to examine further the psychometric functioning of a promising new measure of family engagement, developed with and for Latino Head Start families. Research Findings: Results of this study supported continued use of this measure, with clear caveats and directions for future research. Findings suggested that the ways Latino Head Start parents engage with children’s learning and development at home (e.g., supporting children’s social awareness and behavior, connection to cultural heritage, academic skills) might be a more culturally nuanced and salient form of engagement, while school-based engagement (e.g., volunteering at school, communicating with teachers) might be a more universal form. Findings contribute to understandings of Latino family engagement as well as to methodological considerations for culture-specific measurement development efforts, with relevance for early education researchers and professionals.  相似文献