Tracking instructional quality across secondary mathematics and English Language Arts classes

Teachers have the largest school-based influence on student learning, yet there is little research on how instructional practice is systematically distributed within tracking systems. We examine whether teaching practice varies significantly across track levels and, if so, which aspects of instructional practice differ systematically. Using multilevel modeling, we find that teachers of low track classrooms provided significantly less emotional support, organizational support, and instructional support to students in their classes than did teachers of high track classrooms. Mathematics classes were also observed to have higher quality instructional support for both content understanding and analysis and problem solving than English classes. We develop cases illustrating how small but significant differences in instructional quality are associated with substantially diverging lived experiences for students in high and low track classes.     

On-chip recalcification of citrated whole blood using a microfluidic herringbone mixer

In vitro assays of platelet function and coagulation are typically performed in the presence of an anticoagulant. The divalent cation chelator sodium citrate is among the most common because its effect on coagulation is reversible upon reintroduction of divalent cations. Adding divalent cations into citrated blood by batch mixing leads to platelet activation and initiation of coagulation after several minutes, thus limiting the time blood can be used before spontaneously clotting. In this work, we describe a herringbone microfluidic mixer to continuously introduce divalent cations into citrated blood. The mixing ratio, defined as the ratio of the volumetric flow rates of citrated blood and recalcification buffer, can be adjusted by changing the relative inlet pressures of these two solutions. This feature is useful in whole blood assays in order to account for differences in hematocrit, and thus viscosity. The recalcification process in the herringbone mixer does not activate platelets. The advantage of this continuous mixing approach is demonstrated in microfluidic vascular injury model in which platelets and fibrin accumulate on a collagen-tissue factor surface under flow. Continuous recalcification with the herringbone mixer allowed for flow assay times of up to 30 min, more than three times longer than the time achieved by batch recalcification. This continuous mixer allows for measurements of thrombus formation, remodeling, and fibrinolysis in vitro over time scales that are relevant to these physiological processes.     

Adaptation Guidance for Evidence-Based Teen Pregnancy and STI/HIV Prevention Curricula: From Development to Practice

Evidence-based interventions (EBIs) are effective in preventing adolescent pregnancy and sexually transmitted infections; however, prevention practitioners are challenged when selecting and adapting the most appropriate programs. While there are existing adaptation frameworks, there is little practical guidance in applying research in the field. To address this need, the Centers for Disease Control and Prevention (CDC) Division of Reproductive Health initiated the Adaptation Guidance Project. The project included the development of a comprehensive adaptation guidance framework and adaptation kits for select evidence-based teen pregnancy and HIV prevention programs. In addition, three innovative concepts emerged that have application to other adaptation program and evaluation efforts, including moving research into practice. First, the authors defined the core components of an EBI in three distinct ways: core content, core pedagogy, and core implementation. Second, they piloted a practitioner-friendly adaptation guidance-messaging schema—Green, Yellow, and Red Light Adaptations, and last they included fidelity/adaptation monitoring logs. This article will describe the process used to develop the adaptation guidance kits, including the main features and tools.     

A comparison of men's and women's strength to body mass ratio and varus/valgus knee angle during jump landings

The purpose of this investigation was to compare valgus/varus knee angles during various jumps and lower body strength between males and females relative to body mass. Seventeen recreationally active females (age: 21.94 ± 2.59 years; height: 1.67 ± 0.05 m; mass: 64.42 ± 8.39 kg; percent body fat: 26.89 ± 6.26%; squat one-repetition maximum: 66.18 ± 19.47 kg; squat to body mass ratio: 1.03 ± 0.28) and 13 recreationally active males (age: 21.69 ± 1.65 years; height: 1.77 ± 0.07 m; mass: 72.39 ± 9.23 kg; percent body fat: 13.15 ± 5.18%; squat one-repetition maximum: 115.77 ± 30.40 kg; squat to body mass ratio: 1.59 ± 0.31) performed a one-repetition maximum in the squat and three of each of the following jumps: countermovement jump, 30 cm drop jump, 45 cm drop jump, and 60 cm drop jump. Knee angles were analysed using videography and body composition was analysed by dual-energy X-ray absorptiometry to allow for squat to body mass ratio and squat to fat free mass ratio to be calculated. Significant differences (P ≤ 0.05) were found between male and female one-repetition maximum, male and female squat to body mass ratio, and male and female squat to fat free mass ratio. Significant differences were found between male and female varus/valgus knee positions during maximum flexion of the right and left leg in the countermovement jump, drop jump from 30 cm, drop jump from 45 cm, and drop jump from 60 cm. Correlations between varus/valgus knee angles and squat to body mass ratio for all jumps displayed moderate, non-significant relationships (countermovement jump: r = 0.445; drop jump from 30 cm: r = 0.448; drop jump from 45 cm: r = 0.449; drop jump from 60 cm: r = 0.439). In conclusion, males and females have significantly different lower body strength and varus/valgus knee position when landing from jumps.     

Googled: the quest for visibility on the Internet

Small publishing‐related firms have a problem getting their services and products known to the scholarly and STM market. Getting listed on search engine results pages is difficult due to the way the most popular search engines rank sites. Galayaa has tried out Google's AdWords as a way to get noticed. Does it work? An impression of early results of the campaign is given.     

Resilience in Preschoolers and Toddlers from Low-Income Families

Authoritative parenting has been demonstrated to promote healthy, loving children across home environments of different SES income levels. However, anecdotal evidence shows that some children who encounter nonsupportive parenting and an impoverished environment may develop into remarkably resilient children. Further research is needed in this area of child development.     

Emotional Competence, Emotion Socialization, and Young Children's Peer-Related Social Competence

This study investigated linkages between aspects of emotional competence and preschoolers' social skills with peers. Whether parental emotion socialization practices contributed to the prediction of social skill once emotional competence was statistically controlled was also of interest. Eighty-one predominantly Caucasian preschoolers were videotaped as they participated in three same-sex triadic peer situations. Four peer variables were coded from the videotapes: social initiations, the frequency with which children were the targets of positive social bids, non-constructive anger-related reactions, and prosocial acts. The emotional competence measures included situation knowledge, children's explanations of emotions, positivity of emotional expression during peer play, and emotional intensity. Maternal anger directed at the child was the measure of emotion socialization. Results revealed that the emotional competence variables were meaningfully related to the peer variables and that, for non-constructive anger reactions, maternal reports of anger explained unique variance. Results are discussed in terms of how emotional competence and emotion socialization contribute to peer behavior and the importance of designing and implementing affective intervention programs for young children and their families.     

Comprehension of humor in children with nonverbal learning disabilities,reading disabilities,and without learning disabilities

The normal development of humor in children has been well documented with a predictable course that is tied to social, cognitive, and linguistic development in children. This study explored humor comprehension in children with nonverbal learning disabilities (NVLD). Children with NVLD were compared with children with reading disabilities and a comparison group of children with no learning disabilities to assess their comprehension of humor. The humor test was composed of a joke and cartoon section. No group differences in humor comprehension were found when the NVLD group was defined as having visual–spatial and visual reasoning deficits. However, when the NVLD group was divided into children with and without social perceptual difficulties as defined by a direct measure of social comprehension, significant group differences were found in the levels of humor comprehension. These results support the association of humor comprehension with social perception and lend tentative support to the hypothesis that children with NVLD may not be a homogenous group. Future study directions include further exploration into the nature of the association between humor comprehension and social perception as well as closer examination of the heterogeneity of NVLD.