试论“促进概念性理解”的科学课教学

促进概念性理解的科学课教学是以帮助学生获得对科学概念的真正理解、发展学生的思维和科学理解力为目标的课程设计理念与实施模式,它有助于激发学生积极的思维,真正实现学生对科学概念的建构。     

Gender and high school chemistry: student perceptions on achievement in a selective setting

This paper reports on research undertaken in a middle-class Australian school. The focus of the research was on the relationship between gender and students’ engagement with high school chemistry. Achievement data from many OECD countries suggest that middle-class girls are achieving equally as well as, if not better than, boys in many subjects. This has led to claims that the ‘girls and science’ agenda is no longer necessary, and indeed may have been detrimental to boys’ achievements in science subjects. The data collected from students at this site indicate that at this school this agenda is far from a completed one. These data indicate that whilst girls’ achievement levels are comparable with those of the boys, for many students chemistry is still perceived as a masculine subject. Hence, the girls in the chemistry classrooms at this school construct themselves, and are constructed, as outsiders in the subject.     

从“山寨机”看非典型名名组合的意义建构

非典型名名组合一方面反映了语言形式和表达的相似性,同时也揭示了意义构建的复杂性。因为该组合的意义并非来自其各组成部分意义的简单相加,而是经过整合后形成的新创意义。换句话说,非典型名名组合的意义是由这两个名词所构成的输入心理空间在环境信息和背景知识的共同影响下形成一个具有新创结构的整合空间,然后经过组合、完善和细化产生了新的意义。     

The use of mobile devices as means of data collection in supporting elementary school students’ conceptual understanding about plants

The purpose of this study was to examine the impact of mobile learning among young learners. Specifically, we investigated whether the use of mobile devices for data collection during field trips outside the classroom could enhance fourth graders’ learning about the parts of the flower and their functions, flower pollinators and the process of pollination/fertilization, and the interrelationship between animals and plants, more than students’ use of traditional means of data collection. For this purpose, we designed a pre–post experimental design study with two conditions: one in which participants used a mobile device for data collection and another using traditional means (e.g. sketching and note-taking). The sample comprised 48 fourth graders (24 in each condition), who studied the flower, its parts, and their functions. A conceptual test was administered to assess students’ understanding before and after instruction. Moreover, the students’ science notebooks and accompanying artifacts were used as a data source for examining students’ progress during the study's intervention. The conceptual test and notebook data were analyzed statistically, whereas we used open coding for the artifacts. Findings revealed that using mobile devices for data collection enhanced students’ conceptual understanding more than using traditional means of data collection.     

Longitudinal associations of student–teacher relationships and behavioural and emotional strengths on academic achievement

Positive student–teacher relationships are related to students’ academic achievement and behavioural and emotional adjustment. How a student’s behavioural and emotional strengths are associated with these relationships and how the relationships influence students’ academic performance remains unknown. We examined this framework using a cross-lagged panel model with a group of Finnish students and their parents from Grade 5 to Grade 7. The results revealed that the parents rated behavioural and emotional strengths are stable over a 1-year (r = .78) and 2-year (r = .71) period and that students’ perceptions of student–teacher relationships demonstrated greater change over time (r’s = .54, .35). Behavioural and emotional strengths demonstrated a positive relationship with student–teacher relationships as well as academic achievement (β = .39, p < .01). Strengths were also indirectly associated with academic achievement via student–teacher relationships. Study limitations, implications and future research are discussed.     

Teacher Effects on Minority and Disadvantaged Students’ Grade 4 Achievement

ABSTRACT

The authors examined the differential effects of teachers on female, minority, and low-socioeconomic status (SES) students’ achievement in Grade 4. They used data from a randomized experiment (Project STAR) and its follow-up study (LBS). Student outcomes included Grade 4 SAT scores in mathematics, reading, and science and student demographics included gender, race, and SES. The authors used multilevel models to determine how teacher effectiveness interacted with student gender, race, and SES. We also explored whether teacher effects were more pronounced in schools with high proportions of minority or female students. Results indicated that all students benefited from having effective teachers. The differential teacher effects on female, minority, and low-SES students’ achievement, however, were insignificant. There is some evidence in mathematics that teacher effects are more pronounced in high-minority schools. Finally, teacher effects seem to be consistent within and between schools.     

超越事实:基于科学教育实践的问题与思考

当前以具体事实为中心的科学教育实践存在着一些弊端。超越事实的科学课教学的基本内涵是指:在科学课设计与实施过程中,以具体科学概念和概念性观念为核心,以具体事实性知识和主题为工具,以发展学生思维能力、促进学生对科学的理解并最终提升学生的科学素养为目标。改进当前以具体事实为中心的科学教育实践的策略是:改进现有的课程设计与编排;在科学教育中关注科学史的内容;改善教师培训的内容和形式,提高教师自身的科学素养。     

How Much Have They Retained? Making Unseen Concepts Seen in a Freshman Electromagnetism Course at MIT

The introductory freshmen electromagnetism course at MIT has been taught since 2000 using a studio physics format entitled TEAL—Technology Enabled Active Learning. TEAL has created a collaborative, hands-on environment where students carry out desktop experiments, submit web-based assignments, and have access to a host of visualizations and simulations. These learning tools help them visualize unseen electromagnetic concepts and develop stronger intuition about related phenomena. A previous study has shown that students who took the course in the TEAL format (the experimental group) gained significantly better conceptual understanding than those who took it in the traditional lecture-recitation format (the control group). The present longitudinal study focuses on the extent to which these two research groups (experimental and control) retain conceptual understanding about a year to 18 months after finishing the course. It also examines students attitudes about whether the teaching format (TEAL or traditional) contributes to their learning in advanced courses. Our research has indicated that the long-term effect of the TEAL course on students’ retention of concepts was significantly stronger than that of the traditional course. This research is significant because it documents the long-term cognitive and affective impact of the TEAL studio physics format on learning outcomes of MIT students.