Mushroom Delight

Angel：西兰花烩双菇是一道烩菜,做法和用料皆简单,具有营养丰富、汁香味鲜、滑嫩爽口等特点。双菇中的白玉菇只有秋冬两季才有,菇体洁白清香。质地细腻,口感爽滑,由于其味清淡,煮汤食用会略显乏味,需经拌炒或烩制等烹调法．方可衬托其鲜味。     

Evaluating Content-Related Validity Evidence Using a Text-Based Machine Learning Procedure

Validity evidence based on test content is critical to meaningful interpretation of test scores. Within high-stakes testing and accountability frameworks, content-related validity evidence is typically gathered via alignment studies, with panels of experts providing qualitative judgments on the degree to which test items align with the representative content standards. Various summary statistics are then calculated (e.g., categorical concurrence, balance of representation) to aid in decision-making. In this paper, we propose an alternative approach for gathering content-related validity evidence that capitalizes on the overlap in vocabulary used in test items and the corresponding content standards, which we define as textual congruence. We use a text-based, machine learning model, specifically topic modeling, to identify clusters of related content within the standards. This model then serves as the basis from which items are evaluated. We illustrate our method by building a model from the Next Generation Science Standards, with textual congruence evaluated against items within the Oregon statewide alternate assessment. We discuss the utility of this approach as a source of triangulating and diagnostic information and show how visualizations can be used to evaluate the overall coverage of the content standards across the test items.     

Probability Learning: Changes in Behavior Across Time and Development

Individuals track probabilities, such as associations between events in their environments, but less is known about the degree to which experience—within a learning session and over development—influences people's use of incoming probabilistic information to guide behavior in real time. In two experiments, children (4–11 years) and adults searched for rewards hidden in locations with predetermined probabilities. In Experiment 1, children (n = 42) and adults (n = 32) changed strategies to maximize reward receipt over time. However, adults demonstrated greater strategy change efficiency. Making the predetermined probabilities more difficult to learn (Experiment 2) delayed effective strategy change for children (n = 39) and adults (n = 33). Taken together, these data characterize how children and adults alike react flexibly and change behavior according to incoming information.     

Improving the Transition Outcomes of Low-Income Minority Youth with Disabilities

This study describes the results of a program developed to improve the transition outcomes of low-income minority youth with disabilities. The program relies on case management support to facilitate interagency collaboration. The participants included 164 graduates from special education and 26 youth from an equivalent comparison group. Two case managers were responsible for providing support to intervention participants. Results indicate that 82% of the intervention participants enrolled in postsecondary education programs compared to only 50% in the comparison group. In addition, 74% of the intervention youth secured employment compared to 23% in the comparison group. Case managers provided 10 main support functions in three areas: job, college, and family/community. Critical functions included assistance with goal setting, transportation, job/college applications, referrals, emotional support, and family mediation. We discuss the implications of the intervention for transition research and practice with minority youth with disabilities.     

A functional agility short-term fatigue protocol changes lower extremity mechanics

The purpose of this study was to evaluate the effects of a functional agility fatigue protocol on lower extremity biomechanics between two unanticipated tasks (stop-jump and sidestep). The subjects consisted of fifteen female collegiate soccer athletes (19±0.7 years, 1.67±0.1 m, 61.7±8 kg) free of lower extremity injury. Participants performed five trials of stop-jump and sidestep tasks. A functional short-term agility protocol was performed, and immediately following participants repeated the unanticipated running tasks. Lower extremity kinematic and kinetic values were obtained pre and post fatigue. Repeated measures analyses of variance were conducted for each dependent variable with an alpha level set at 0.05. Knee position post-fatigue had increased knee internal rotation (11.4±7.5° vs. 7.9±6.5° p=0.011) than pre-fatigue, and a decreased knee flexion angle (-36.6±6.2° vs. ?40.0±6.3°, p = 0.003), as well as hip position post-fatigue had decreased hip flexion angle (35.5±8.7° vs. 43.2±9.5°, p = 0.002). A quick functional fatigue protocol altered lower extremity mechanics of Division I collegiate soccer athletes during landing tasks. Proper mechanics should be emphasized from the beginning of practice/game to aid in potentially minimizing the effects of fatigue in lower extremity mechanics.     

Student learning in science simulations: Design features that promote learning gains

This research examines science‐simulation software available for grades 6–12 science courses. The study presented, funded by the National Science Foundation, had two objectives: a literature synthesis and a product review. The literature synthesis examines research findings on grade 6–12 student learning gains and losses using virtual laboratories and science‐simulation software, derived from a review of 79 relevant studies identified. Based on that literature, significant aspects of how such products influence student learning are identified. Tables summarize the research‐based evidence about best practices in instructional design for such virtual lab and simulation products. Some products were then reviewed as case studies to determine in what ways and to what extent they implement such research‐identified best practices. The overall goal was to consider where the most progress is being made in effective virtual‐lab and simulation products, and what directions future development should take. The intent is to inform science educators, teachers, administrators, and policy makers who are using, buying, and examining middle and high school instructional materials. © 2011 Wiley Periodicals, Inc. J Res Sci Teach 48: 1050–1078, 2011     

Teaching Social Justice Research to Undergraduate Students in Puerto Rico: Using Personal Experiences to Inform Research

This article explores the process of teaching undergraduate students to conduct social justice research. We were interested in understanding how to develop a social justice perspective among students while training them in conventional research methods. The following questions guided our research activities. How can the principles of social justice inform undergraduate research projects? What pedagogical strategies prepare students to conduct social justice-based research? What are the challenges and opportunities in teaching social justice research? We documented the lessons and activities during the field school and collected students’ comments in journals, extensive observations, focus groups, and interviews to understand the influence of social justice on the students’ approach to research. We identify three lessons in teaching social justice. First, teaching social justice requires that students develop meaningful relationships with the community understudy. Second, gender dynamics can prohibit or promote meaningful student engagement and learning. Third, it is important to consider how to integrate, rather than “add on,” social justice activities and discussions into research lessons.     

More Than a Pipeline Problem: Labor Supply Constraints and Gender Stratification Across Academic Science Disciplines

Employing a nationally representative sample of science faculty in U.S. colleges, we investigate 3 explanations for persisting differences in women's faculty representation across science fields even after adjusting for women's variable representation among doctoral recipients. First, we examine labor market factors: (a) differential growth rates and critical mass in the supply of women doctoral recipients, (b) growth or contraction in academic and nonacademic job opportunities, and (c) presence of foreign-born scholars. Second, we control for institutional explanations such as differential rates of faculty unionization and less receptivity to women at prestigious or research-oriented universities and fields that are applied, soft, or nonlife sciences. Third, gender role explanations are addressed by controlling for gender differences in work experience, work interruptions, and the prestige of doctoral credentials. After finding that none of these explanations account fully for distinctive patterns among science fields in the faculty gender composition, we discuss how they may reflect differences in academic cultures.     

Team‐Based Learning for Students with High‐Incidence Disabilities in High School Social Studies Classrooms

We examined the effectiveness of implementing team‐based learning (TBL) practices on content acquisition for 11th grade students with high‐incidence disabilities enrolled in general education social studies courses. TBL components focus on collaborative discourse within heterogeneous teams. TBL, which requires critical thinking and the application of content knowledge for problem‐solving, was implemented for three units of instruction. Results indicated no statistically significant differences between groups on a measure of content knowledge, although a moderate effect size was noted (ES = 0.50). Significant and large effects (ES = 1.01) favoring the TBL treatment were noted for items related to content‐area vocabulary. There were no significant differences on items measuring comprehension of historical events, facts, and issues (ES = 0.38). Practical implications for content‐area instruction are discussed.