The importance of orientation: implications of professional identity on classroom practice and for professional learning

Previous work on new teacher professional identity has focused on identity as a process of negotiation between individual and contextual factors. These negotiations are often filled with a struggle between personal agency and structures that prevent the enactment of an ideal professional self. This study introduces and discusses three teacher professional identity orientations (self, classroom, and dialogic) and the implications of each orientation on a teacher’s professional identity and classroom practice. While each focal teacher featured in the study drew from similar sources of professional identity (experiences as students, classroom practical experience, and theory/research), the teachers varied in the degree of importance accorded to each identity source. This variation led to differences in approach to their roles as teachers as well as differences in their work with students. Using a qualitative, comparative case study methodology to highlight features of each professional identity orientation, this study provides evidence of discourse related to each orientation and discusses implications of identity orientation in each case study teacher’s classroom practice. After the discussion and analysis of the data, the author offers recommendations for teacher educators (pre-service and in-service) and researchers related to understandings of professional identity development and implications for the work of pre-service teacher education and continuing professional development.     

Hematocrit and flow rate regulate the adhesion of platelets to von Willebrand factor

Primary hemostasis and blood clotting is known to be influenced by the red blood cell volume fraction (hematocrit) in blood. Depressed or elevated levels of red blood cells can lead to vascular perfusion problems ranging from bleeding to thrombus formation. The early stage of hemostasis and thus blood clotting in all vessel sections from the arterial to the venous system involves the adhesion of platelets to von Willebrand factor. Here we present experimental and theoretical results showing that the adhesion probability of platelets to von Willebrand factor is strongly and nonlinearly dependent on hematocrit and flow rate. Interestingly, the actual binding forces are not markedly different, which suggest that the origin of such behavior is in the distribution of platelets. Using hydrodynamic simulations of a simple model, we explicitly show that the higher the hematocrit and the flow rate, the larger the amount of platelets residing close to the wall. Our simulation results, which are in excellent agreement with the experimental observations, explain why such phenomena occur. We believe that the nonhomogeneous red blood cell distribution as well as the shear dependent hydrodynamic interaction is key for the accumulation of platelets on the vessel wall. The work we present here is an important step forward from our earlier work on single molecules and extends into the collective cellular behavior of whole blood. It sheds new light on the correlation between hematocrit and the initial steps in hemostasis and thrombosis, and outlines advances for the treatment of vascular diseases associated with high levels of red blood cells. These results are not only highly relevant for the field of hemostasis and the physics of blood clotting but are also of powerful impact in applied science most obviously in drug delivery and colloidal science.     

Using coaching to increase preschool teachers’ use of emergent literacy teaching strategies

This single-subject study assessed the effects of in-classroom coaching on early childhood teachers’ use of emergent literacy teaching strategies. Teaching strategies were grouped into clusters related to oral language and comprehension of text, phonological awareness and alphabetic principle, and print concepts and written language, with coaching being applied to each cluster separately. The coaching process included two primary components: a brief initial meeting to introduce teaching strategies in the cluster, and semi-weekly observation with follow-up discussion using data collected during the observation. A third, booster component was added when the teacher did not achieve a pre-established criterion. Participants were five early childhood teachers, three in child care programs and two in public school pre-kindergarten programs. The intervention phase lasted approximately 6 weeks for each teacher. Results indicated that this approach to coaching was effective for increasing the number of teaching strategies that teachers used in each cluster. Individual differences among teachers are discussed, and implications for future research and practice are explored.     

Confucian Principles: A Study of Chinese Americans’ Interpersonal Relationships in Selected Children’s Picturebooks

There has not been enough critical analysis of children’s literature by and about Chinese Americans, especially when compared to other minority groups in the United States. In particular, Chinese American historical books lack extensive analysis. It is important to reflect cultural accuracy in literature and to help children develop clear concepts of self and others by providing precise cultural and physical characteristics of people. While cultural authenticity allows children the opportunity to see a reflection of real experiences within a book instead of seeing stereotypes or misrepresentations, obtaining correct information about a certain time period can help children to see images of immigration accurately represented in literature. Using the Confucian delineation of interpersonal relationships as the major criterion of cultural authenticity, this article examines three currently available children’s picturebooks set in the historical period between 1848 and 1885. In addition to exploring how Chinese Americans’ interpersonal relationships are portrayed in these children’s historical books, this article argues for more proactive inclusion of the diversity in selection of picturebooks.     

Does student learning style affect performance on different formats of biomechanics examinations?

Students' learning style preferences have been widely adapted into teaching and learning environments. The purpose of this study was to investigate the relationship between self-reported and assessed learning style preferences (visual, auditory, reading/writing, kinesthetic: VARK) on performance in different types of multiple-choice examinations (T1: text only format and T2: visual format) given in an introductory biomechanics class. Students who enrolled in three biomechanics classes at a state university were recruited to participate in the study. Ninety students (47 males and 43 females) completed a learning style survey and two types of examinations. Results showed that approximately half of the students were assessed and self-reported as kinesthetic for their preferred learning style. There was no significant difference in test performance between students who preferred visual and reading/writing learning styles (self-reported and assessed). These students demonstrated similar learning and comprehension of biomechanical concepts regardless of whether the test material was presented in their preferred sensory mode or not. Interestingly, female students' perceptions of their learning style preference may have a positive effect on the test results when the test is presented in their preferred format.     

An investigation of knowledge‐building activities in an online community of practice at Subaru of America

Current approaches to workplace learning emphasize designing communities of practice that are intended to support both formal and informal knowledge acquisition. This article presents the design and research of a knowledge‐based community of practice for Subaru, based on principles outlined by Scardamalia (2002) and Zhang, Scardamalia, Lamon, Messina, and Reeve (2007). The purpose of this study was to investigate the extent to which participants' interactions in the online community showed evidence of individual and collective knowledge building. We found evidence of knowledge building within online discussions in these areas: interactions around improvement of ideas, connection to workplace knowledge and practices, and building on or adopting the ideas of others. We also found significant gains in scores on an assessment of workplace customer service after participation in the online community of practice.     

Exploring students’ conceptions of science learning via drawing: a cross-sectional analysis

ABSTRACT

This cross-sectional study explored students’ conceptions of science learning via drawing analysis. A total of 906 Taiwanese students in 4th, 6th, 8th, 10th, and 12th grade were asked to use drawing to illustrate how they conceptualise science learning. Students’ drawings were analysed using a coding checklist to determine the presence or absence of specified attributes. Data analysis showed that the majority of students pictured science learning as school-based, involving certain types of experiment or teacher lecturing. In addition, notable cross-sectional differences were found in the ‘Activity’ and ‘Emotions and attitudes’ categories in students’ drawings. Three major findings were made: (1) lower grade level students conceptualised science learning with a didactic approach, while higher graders might possess a quantitative view of science learning (i.e. how much is learned, not how well it is learned), (2) students’ positive and negative emotions and attitudes toward science learning reversed around middle school, and (3) female students expressed significantly more positive emotions and attitudes than their male counterparts. In conclusion, higher graders’ unfruitful conceptions of science learning warrant educators’ attention. Moreover, further investigation of girls’ more positive emotions and attitudes found in this study is needed.     

International programs of the National Library of Medicine

The National Library of Medicine (NLM) has a broad mission in biomedical information service. There are three major reasons for NLM, as a national institution, having an international program: first, the global nature of disease; second, the international scope of medical literature; and third, the universal goal of better communication. This paper reviews NLM's programs in relation to international medical information exchange: International MEDLARS Centers, collaboration with WHO and PAHO, NLM Special Foreign Currency Program, and development of the NLM collection.     

Physical activity correlates for children with autism spectrum disorders in middle school physical education

This study examined potential correlates that might influence physical activity (PA) of adolescents with autism spectrum disorders (ASD) in physical education. Students with (n = 19) and without (n = 76) ASD wore an accelerometer during physical education. Data were collected in 38 physical education lessons. The results showed that (a) students with ASD were less physically active than their peers, (b) their PA was related positively to their social interaction with peers, and (c) their moderate to vigorous PA depended on PA content, physical environment, and instructor-related characteristics. The findings suggest a need for additional studies on the relationship between the needs of adolescents with ASD and the content offered in physical education so as to inform school policies and help to remove barriers to promoting PA among this population.