Children’s Ability to Learn Evolutionary Explanations for Biological Adaptation

Research Findings: Evolution by natural selection is often relegated to the high school curriculum on the assumption that younger students cannot grasp its complexity. We sought to test that assumption by teaching children ages 4–12 (n = 96) a selection-based explanation for biological adaptation and comparing their success to that of adults (n = 30). Participants provided explanations before and after a 10-min, analogy-based tutorial illustrating the principles of variation, differential survival, differential reproduction, inheritance, and population change. Although younger children (ages 4–6) showed minimal evidence of learning these principles, older children (ages 7–12) showed robust evidence of doing so, learning them at rates equivalent to adults. Participants of all ages, however, provided nonevolutionary explanations for biological adaptations (i.e., explanations referencing need, growth, and creation) nearly as often at posttest as they did at pretest. Practice or Policy: These results suggest that older elementary school-age children can be taught evolutionary concepts but that learning such concepts does not lead to the automatic replacement of nonevolutionary views of biological adaptation, which must be addressed separately.     

The20 Explanations From郑元畅

对于郑元畅来说，2009年最大的收获，就是从演员变身为了歌手，很多东西对他来说都是新的。带着新人歌手的身份．郑元畅再次出发．满怀紧张与期待的心情．只为交出一份让大家满意的答卷。     

Undergraduate Students’ Preferences for Constructed Versus Multiple-Choice Assessment of Learning

Students (N = 161) in seven sections of an undergraduate educational psychology course rated ten performance-assessment options in collegiate courses. They rated in-class essay exams as their most preferred assessment and multiple-choice exams (in-class and out-of-class) as their least preferred. Also, student ratings of multiple papers and a term paper did not differ significantly from the rating for in-class essay exams. Overall, students preferred constructed forms of assessment over more objective assessment. With minor exceptions, student ratings of assessment preferences were generally consistent across gender and academic levels. In the main, student ratings of assessment options did not significantly correlate with exam performance in the course.     

The Development of Occupational Sex‐role Stereotypes,Occupational Preferences and Academic Subject Preferences in Children at Ages 8, 12 and 16

This paper reports data from a questionnaire‐based UK study aimed at examining occupational sex‐role stereotypes and occupational preferences of male and female pupils at three ages. Data were collected from 594 children in total (108 8‐year‐olds, 307 12‐year‐olds and 177 16‐year‐olds) who responded to questions that asked for their views on who (males, females or both) should perform certain occupations and how much they would like to have each of the occupations as their career. The children were also asked to indicate their favourite school subject. Analysis indicated that the youngest age group held significantly more stereotyped views regarding who should perform certain jobs than the older children and that, generally, boys sex‐typed appropriateness of occupations to a significantly greater degree than girls, although this difference was not significant in the youngest age group. Furthermore, analysis of the occupational preference ratings revealed significant differences between male and female subjects for many occupations, with higher ratings generally being awarded to stereo‐typically gender‐appropriate careers. Significant differences between the three age groups were also observed in the preference ratings for many occupations, with a tendency for the majority of occupations to be perceived less favourably with increasing age of respondent. Finally, school subject preferences were considered. No consistent or stable pattern of preference emerged for males and females across age‐groups, confirming recent suggestions that gender stereotyping of school subjects is weakening.     

Searching for Explanations in Science Trade Books: What can we learn from Coh-Metrix?

Given the importance of explanation in science texts for children, this research explored Coh-Metrix as a tool for rapidly determining the presence of explanations in science trade books. Variables from Coh-Metrix specifically addressing cause (causal content, causal cohesion, and positive causal connectives) were correlated with an existing, high-inference causal variable from previous research. Moderate correlations were found for causal cohesion and positive causal connectives (both r(18) = 0.46, p < 0.05); no correlation was found with causal content. Somewhat stronger correlations were found with two, co-referential Coh-Metrix variables, argument overlap and stem overlap. These findings suggest that Coh-Metrix may be used for an initial screening to determine if a science text has the necessary conditions to be explanatory.     

Elementary Teachers’ Preferences for Pre-Service and In-Service Training in the Teaching of Reading

Abstract

The purpose of this study was to discover guidelines for improving the pre-service and in-service training of elementary teachers to teach reading. Three hundred and eight elementary teachers were queried regarding (1) their attitudes toward their pre-service education, (2) their educational needs, and (3) their preferences for in- service program formats. Responses were analyzed according to grade levels taught and years of service. The main conclusion was that elementary teachers of different grades and with different terms of service express different attitudes, needs and preferences regarding their training to teach reading. Implications for pre-service and in-service training programs are discussed.     

Preschool Teachers’ Explanations for Hygiene Habits and Young Children’s Biological Awareness of Contamination

Research Findings: Preschools have many norms and rules children are supposed to follow. Among them, behavioral norms associated with mealtime are of great consequence because eating is an essential life function. The present study examined young Japanese children’s understanding of hygiene norms and rules at mealtime from the standpoint of their awareness of contamination. Previous studies on contamination sensitivity have mainly focused on children’s knowledge itself and have paid little attention to the origins of such knowledge. However, the present study examined how adults talk to children about contamination as 1 possible source of children’s knowledge. Practice or Policy: Study 1 involved 32 days of observations during lunchtime at 3 Tokyo preschools. The teachers frequently told children to adhere to hygiene habits such as washing their hands. Although preschool teachers attached much weight to hygiene, their explanations were not precise. They often used 1-word or 1-phrase directions (e.g., “Dirty”) or just input-output explanations such as “Please wash your hands, or you’ll get sick.” Explanations of why breaking hygiene norms would lead to sickness were seldom offered to children. In Study 2, 26 children age 3 (M age = 3.7) and 22 children age 5 (M age = 5.7) were asked to explain why breaking hygiene norms would lead to sickness. In contrast with teachers’ simple expressions in Study 1, even 3-year-old children frequently generated contamination mechanism explanations (e.g., referring to germs and disgust transmission spontaneously).     

Children’s Preferences for Group Musical Activities in Child Care Centres: A Cross-Cultural Study

This paper reports on a cross-cultural research study of children’s preferences for group musical activities in child care centres. A total of 228 young children aged 4–5 years in seven child care centres in Hong Kong and in the Adelaide City of South Australia participated in the study. Both qualitative and quantitative data were collected via a mixed method approach. Result showed that dancing/moving was children’s most preferred musical activity in centres. Significant differences were found between children’s cultural contexts and their preferences for three activities: (1) Singing; (2) Listening; and (3) Playing instruments. Qualitative data further revealed the social phenomena of these two cultural contexts which influenced children’s preferences. Implications for the curriculum planning of early childhood music education arising from these findings are discussed.     

Preferences,Proximity, and Controlled Choice: Examining Families’ School Choices and Enrollment Decisions in Louisville,Kentucky

This study provides evidence studying one diverse, countywide district’s integration efforts utilizing school choice and parental preferences. The findings illustrate substantial differences about the way in which the district’s student assignment policy affects students. In particular, this choice-based integration policy with a weak geographic preference still advantages those who choose their nearest schools as well as white students and those living in more advantaged areas. Examining differences in families’ school preferences, whether students are assigned to their preferred school, and whether and where students enroll in schools illustrates how an integration-focused assignment policy can still result in segregation and inequality. Yet, by illustrating the many influences on family preferences beyond proximity, it also suggests the opportunity for using assignment policy to overcome persistent neighborhood segregation.     

Producing Scientific Explanations in Physics—a Multimodal Account

Research in Science Education - This study focuses on the relationship between students’ use of language resources and their conceptualisation of phenomena in producing scientific...     

Responding to Students’ Learning Preferences in Chemistry

This paper reports on a teacher’s and his students’ responsiveness to a new tetrahedral-oriented (Mahaffy in J Chem Educ 83(1):49–55, 2006) curriculum requiring more discursive classroom practices in the teaching of chemistry. In this instrumental case study, we identify the intentions of this learner-centered curriculum and a teacher’s development in response to this curriculum. We also explore the tensions this teacher experiences as students subsequently respond to his adjusted teaching. We use a Chemistry Teacher Inventory (Lewthwaite and Wiebe in Res Sci Educ 40(11):667-689, 2011; Lewthwaite and Wiebe in Can J Math Sci Technol Educ 12(1):36–61, 2012; Lewthwaite in Chem Educ Res Pract. doi:10.1039/C3RP00122A, 2014) to assist the teacher in monitoring how he teaches and how he would like to improve his teaching. We also use a student form of the instrument, the Chemistry Classroom Inventory and Classroom Observation Protocol (Lewthwaite and Wiebe 2011) to verify the teacher’s teaching and perception of student preferences for his teaching especially in terms of the discursive processes the curriculum encourages. By so doing, the teacher is able to use both sets of data as a foundation for critical reflection and work towards resolution of the incongruence in data arising from students’ preferred learning orientations and his teaching aspirations. Implications of this study in regards to the authority of students’ voice in triggering teachers’ pedagogical change and the adjustments in ‘teachering’ and ‘studenting’ required by such curricula are considered.     

Factors Influencing Entering Teacher Candidates’ Preferences for Instructional Activities: A glimpse into their orientations towards teaching

The present study was designed to identify and characterize the major factors that influence entering science teacher candidates’ preferences for different types of instructional activities, and to analyze what these factors suggest about teacher candidates’ orientations towards science teaching. The study involved prospective teachers enrolled in the introductory science teaching course in an undergraduate science teacher preparation program. Our analysis was based on data collected using a teaching and learning beliefs questionnaire, together with structured interviews. Our results indicate that entering science teacher candidates have strong preferences for a few activity types. The most influential factors driving entering science teacher candidates’ selections were the potential of the instructional activities to motivate students, be relevant to students’ personal lives, result in transfer of skills to non‐science situations, actively involve students in goal‐directed learning, and implement curriculum that represents what students need to know. This set of influencing factors suggests that entering science teacher candidates’ orientations towards teaching are likely driven by one or more of these three central teaching goals: (1) motivating students, (2) developing science process skills, and (3) engaging students in structured science activities. These goals, and the associated beliefs about students, teaching, and learning, can be expected to favor the development or enactment of three major orientations towards teaching in this population of future science teachers: “motivating students,” “process,” and “activity‐driven.”     

Elementary School Children’s Explanations of Day and Night

Science & Education - Most students have interacted with scientific representations that are used as teaching resources in schools. Often these external representations present challenges for...     

except, besides, but, except for, but for, apart from 等的比较及用法

英语except, besides, but, excepting, except for, but for, save, bar,barring, apart from等介词和复合介词,彼此在含义上和用法上多有异同。如何区别和正确使用它们,正是本文所要讨论的。 1.except和besides besides和except含义相反。besides的意思是in addition to, as well as,除……之外还有,包括在其中(including)、而except的意思是but not, not includ-     

Children’s Teleological Intuitions: What Kind of Explanations Do 7–8 Year Olds Give for the Features of Organisms, Artifacts and Natural Objects?

Research has shown that children usually provide teleological explanations for the features of organisms from a very early age (3?C4?years old). However, it is not clear if teleology is applied selectively for organisms, or if it is generally applied to other objects as well (artifacts and non-living natural objects). The present study examined whether 7?C8?year old students provided teleological explanations for particular organisms, artifacts and natural objects. We investigated whether children's familiarity with these objects influenced the types of explanations they gave. Finally, we also investigated correlations between 'teleology' and 'usefulness' in children's explanations. The results indicate that 7?C8?year olds are able to distinguish between living and non-living entities, as well as that they provide teleological explanations mostly for organisms and artifacts. This may have important implications for biological education, since teleological explanations in classrooms are likely to pose important conceptual obstacles to the development of a scientific understanding of evolution.     

Characterizing High School Students’ Written Explanations in Biology Laboratories

The purpose of this qualitative interpretive research study was to examine high school students’ written scientific explanations during biology laboratory investigations. Specifically, we characterized the types of epistemologies and forms of reasoning involved in students’ scientific explanations and students’ perceptions of scientific explanations. Sixteen students from a rural high school in the Southeastern United States were the participants of this research study. The data consisted of students’ laboratory reports and individual interviews. The results indicated that students’ explanations were primarily based on first-hand knowledge gained in the science laboratories and mostly representing procedural recounts. Most students did not give explanations based on a theory or a principle and did not use deductive reasoning in their explanations. The students had difficulties explaining phenomena that involved intricate cause–effect relationships. Students perceived scientific explanation as the final step of a scientific inquiry and as an account of what happened in the inquiry process, and held a constructivist–empiricist view of scientific explanations. Our results imply the need for more explicit guidance to help students construct better scientific explanations and explicit teaching of the explanatory genre with particular focus on theoretical and causal explanations.     

Refining Students’ Explanations of an Unfamiliar Physical Phenomenon-Microscopic Friction

Research in Science Education - The first phase of this multiphase study involves modeling of college students’ thinking of friction at the microscopic level. Diagnostic interviews were...     

How Effective are Instructional Explanations in Example-Based Learning? A Meta-Analytic Review

The worked example effect within cognitive load theory is a very well-established finding. The concrete effectiveness of worked examples in a learning situation, however, heavily depends on further moderating factors. For example, if learners improve their processing of worked examples by actively explaining the worked examples to themselves, they are usually better able to solve transfer problems. Another way to enhance example processing is to present learners with instructional explanations instead of prompting them to produce these explanations on their own. In this article, we review 21 experimental studies to address the issue whether instructional explanations support example-based learning. Meta-analytic results lead to three important conclusions: First, the benefits of instructional explanations for example-based learning per se are minimal. Second, instructional explanations are more helpful for acquiring conceptual knowledge than for acquiring procedural knowledge. Third, instructional explanations are not necessarily more effective than other methods supporting example processing such as self-explaining.     

谈because,as,Since,for的不同用法

这一组词都含有“由于、因为”的意思,但用法不同。本文就其不同用法归纳分述如下,供同学们学习参阅。