INVESTIGATING THE EFFECTIVENESS OF AN ANALOGY ACTIVITY IN IMPROVING STUDENTS’ CONCEPTUAL CHANGE FOR SOLUTION CHEMISTRY CONCEPTS

This paper reports on an investigation on the use of an analogy activity and seeks to provide evidence of whether the activity enables students to change alternative conceptions towards views more in accord with scientific views for aspects of solution chemistry. We were also interested in how robust any change was and whether these changes in conceptual thinking became embedded in the students’ long-term memory. The study has its theoretical basis in an interpretive paradigm, and used multiple methods to probe the issues in depth. Data collection consisted of two concept test items, one-on-one interviews, and student self-assessment. The sample consisted of 44 Grade 9 students selected from two intact classes (22 each), from Trabzon, Turkey. The interviews were conducted with six students selected because of evidence as to their significant conceptual change in solution chemistry. The research findings revealed statistically significant differences in pre-test and post-test scores, and pre-test and delayed post-test scores (p<0.05), but no differences between post-test and delayed test scores (p>0.05). This suggests that the analogy activity is helpful in enhancing students’ conceptual understanding of solution chemistry, and that these changes may be stored in the students’ long-term memory.     

STUDENTS’ UNDERSTANDING OF EQUILIBRIUM AND STABILITY: THE CASE OF DYNAMIC SYSTEMS

Engineering students in control courses have been observed to lack an understanding of equilibrium and stability, both of which are crucial concepts in this discipline. The introduction of these concepts is generally based on the study of classical examples from Newtonian mechanics supplemented with a control system. Equilibrium and stability are approached in different ways at the various stages of a typical engineering syllabus: at the beginning, they are mostly dealt with a static point of view, for example in mechanics, and are subsequently handled through dynamic analysis in control courses. In general, there is a little clarification of the differences between these concepts or the ways in which they are linked. We believe that this leads to much confusion and incomprehension among engineering students. Several studies have shown that students encounter difficulties when presented with simple familiar or academic static equilibrium cases in mechanics. Our study investigates students’ conceptions and misconceptions about equilibrium and stability through a series of questions about several innovative non-static situations. It reveals that the understanding of these notions is shaken when the systems being studied are placed in inertial or non-inertial moving reference frames. The students in our study were particularly uncertain about the existence of unstable equilibrium positions and had difficulty in differentiating between the two concepts. The results suggest that students use a velocity-based approach to explain such situations. A poor grasp of the above fundamental concepts may result from previous learning experiences. More specifically, certain difficulties seem to be directly linked to a lack of understanding of these concepts, while others are related to misconceptions arising from everyday experiences and the inappropriate use of physical examples in primary school.     

DIAGNOSING STUDENTS’ UNDERSTANDING OF ENERGY AND ITS RELATED CONCEPTS IN BIOLOGICAL CONTEXT

This study diagnosed the understanding about energy and biological-context energy concepts held by 90 first-year South African university biology students. In particular, students’ explanations of energy in a biological context, how energy is involved in different biological situations and whether energy is present and what types of energy are involved in diagrams depicting biological phenomena were investigated. The pencil-and-paper diagnostic test, specifically designed for this study, was used to elicit students’ understanding using test items involving biological phenomena. The results showed that many students had problems in understanding energy and energy-related concepts in the following areas: First, the majority of the students provided definitions of energy rather than the explanations they were asked to provide, and the definition could have been rote-learned. Second, although nearly all students knew the energy conservation principle (energy cannot be created or destroyed), many of them were unable to apply this concept to biological contexts. Third, many students erroneously claimed that the energy for metabolism and life processes is made available during photosynthesis in plants, during digestion in animals or that this energy comes directly from the sun. Fourth, about two thirds of the students erroneously indicated that there is no energy involved/present in inanimate objects such as a statue. The implications for the teaching and learning of energy and its related concepts and recommendations for further research are discussed.     

HIGH SCHOOL STUDENTS’ PROFICIENCY AND CONFIDENCE LEVELS IN DISPLAYING THEIR UNDERSTANDING OF BASIC ELECTROLYSIS CONCEPTS

This study was conducted with 330 Form 4 (grade 10) students (aged 15??C?16?years) who were involved in a course of instruction on electrolysis concepts. The main purposes of this study were (1) to assess high school chemistry students?? understanding of 19 major principles of electrolysis using a recently developed 2-tier multiple-choice diagnostic instrument, the Electrolysis Diagnostic Instrument (EDI), and (2) to assess students?? confidence levels in displaying their knowledge and understanding of these electrolysis concepts. Analysis of students?? responses to the EDI showed that they displayed very limited understanding of the electrolytic processes involving molten compounds and aqueous solutions of compounds, with a mean score of 6.82 (out of a possible maximum of 17). Students were found to possess content knowledge about several electrolysis processes but did not provide suitable explanations for the changes that had occurred, with less than 45?% of students displaying scientifically acceptable understandings about electrolysis. In addition, students displayed limited confidence about making the correct selections for the items; yet, in 16 of the 17 items, the percentage of students who were confident that they had selected the correct answer to an item was higher than the actual percentage of students who correctly answered the corresponding item. The findings suggest several implications for classroom instruction on the electrolysis topic that need to be addressed in order to facilitate better understanding by students of electrolysis concepts.     

EVALUATING STUDENTS’ UNDERSTANDING OF KINETIC PARTICLE THEORY CONCEPTS RELATING TO THE STATES OF MATTER, CHANGES OF STATE AND DIFFUSION: A CROSS-NATIONAL STUDY

This paper reports on the understanding of three key conceptual categories relating to the kinetic particle theory: (1) intermolecular spacing in solids, liquids and gases, (2) changes of state and intermolecular forces and (3) diffusion in liquids and gases, amongst 148 high school students from Brunei, Australia, Hong Kong and Singapore using 11 multiple-choice items that required students to provide explanations for their selection of particular responses to the items. Students’ responses to the items revealed limited understanding of the particle theory concepts, with nine alternative conceptions held by more than 10% of various samples of students. Also, 40.5–78.4% of all students indicated consistent understanding relating to the three conceptual categories based on their responses to the 11 items. However, when their explanations were taken into account, very few students displayed consistent understanding of the related concepts.     

THE IMPACT OF PEER INSTRUCTION ON COLLEGE STUDENTS’ BELIEFS ABOUT PHYSICS AND CONCEPTUAL UNDERSTANDING OF ELECTRICITY AND MAGNETISM

The purpose of this study is to assess students’ conceptual learning of electricity and magnetism and examine how these conceptions, beliefs about physics, and quantitative problem-solving skills would change after peer instruction (PI). The Conceptual Survey of Electricity and Magnetism (CSEM), Colorado Learning Attitudes about Science Survey (CLASS), multiple-choice test was administered as a pre- and posttest with Solomon 4 group design to students (N  =  138) enrolled on freshman level physics course. The number of chapter taught to the students was 14. Problem-solving strategy steps were asked to students in the exam. The analyses of CSEM showed that the treatment group (g  =  0.62) obtained significantly higher conceptual learning gain than the control group (g  =  0.36). The conceptual understanding and problem-solving skills of the students on magnetism considerably enhanced when PI was conducted (37% and 20%, respectively). CLASS results for 5 subscales (conceptual understanding, applied conceptual understanding, problem solving general, problem solving confidence, and problem solving sophistication) supported the findings of CSEM.     

UNDERSTANDING ACID�CBASE CONCEPTS: EVALUATING THE EFFICACY OF A SENIOR HIGH SCHOOL STUDENT-CENTRED INSTRUCTIONAL PROGRAM IN INDONESIA

This study was a mixed quantitative–qualitative research to evaluate the efficacy of a designed student-centred instructional (DSCI) program for teaching about acids and bases. The teaching innovation was designed based on constructivist, hands-on inquiry and context-based approaches and implemented in seven 45-min lessons with a class of 36 grade 11 students (experimental group) from a public senior high school in Indonesia. Another class of 38 students (comparison group) from the same school was instructed using a traditional teacher-centred approach. Data were obtained using a (1) 12-item achievement test on acids and bases that was administered to both groups as a pretest and a posttest, (2) self-evaluation 13-item questionnaire on students’ perceptions of their competence and confidence in carrying out the inquiry activities that was administered to the experimental group and (3) 3-item open-ended questionnaire on students’ perceptions of the instructional process using the DSCI that was administered to the experimental group. The results of the study showed that the teaching innovation was effective in improving students’ understanding of acid–base concepts with significant difference between the two groups on the posttest mean scores. Moreover, the effectiveness of the innovation was supported by an increase in students’ interest in learning science as indicated by their (1) positive perceptions of their engagement and competence in doing inquiry activities, (2) positive perceptions of the learning environment and (3) positive outcome expectations. The findings have implications for chemistry teaching in any institution with similar achieving students as well as for the professional development of teachers.     

IMPACT OF INTERACTIVE MULTIMEDIA MODULE WITH PEDAGOGICAL AGENTS ON STUDENTS’ UNDERSTANDING AND MOTIVATION IN THE LEARNING OF ELECTROCHEMISTRY

The Electrochemistry topic is found to be difficult to learn due to its abstract concepts involving macroscopic, microscopic, and symbolic representation levels. Studies have shown that animation and simulation using information and communication technology (ICT) can help students to visualize and hence enhance their understanding in learning abstract chemistry topics. As a result, an interactive multimedia module with the pedagogical agent (IMMPA) named the EC Lab (Electrochemistry Lab) was developed in order to assist students in the learning of Electrochemistry topics. A non-equivalent pretest–posttest control group design investigation was carried out in order to gauge the effect of the IMMPA EC Lab on students’ understanding and motivation in the learning of Electrochemistry. Some 127 Form Four students from two secondary schools in one of the districts in Malaysia were involved in the study. Each school had one treatment group and one control group taught by the same Chemistry teacher. Instruments involved were a pre- and posttest, a pre- and post-motivation questionnaire, and the IMMPA EC Lab. Results showed a significant difference between the control groups and treatment groups in the understanding of concepts in the learning of Electrochemistry.     

SECONDARY SCHOOL STUDENTS’ UNDERSTANDING OF MATHEMATICAL INDUCTION: STRUCTURAL CHARACTERISTICS AND THE PROCESS OF PROOF CONSTRUCTION

In this study, we investigate the meaning students attribute to the structure of mathematical induction (MI) and the process of proof construction using mathematical induction in the context of a geometric recursion problem. Two hundred and thirteen 17-year-old students of an upper secondary school in Greece participated in the study. Students’ responses in 3 written tasks and the interviews with 18 of them are analyzed. Though MI is treated operationally in school, the students, when challenged, started to recognize the structural characteristics of MI. In the case of proof construction, we identified 2 types of transition from argumentation to proof, interwoven in the structure of the geometrical pattern. In the first type, MI was applied to the algebraic statement that derived from the direct translation of the geometrical situation. In the second type, MI was embedded functionally in the geometrical structure of the pattern.     

PRE-SERVICE PHYSICS TEACHERS’ UNDERSTANDING OF THE RELATIONAL STRUCTURE OF PHYSICS CONCEPTS: ORGANISING SUBJECT CONTENTS FOR PURPOSES OF TEACHING

Good conceptual understanding of physics is based on understanding what the key concepts are and how they are related. This kind of understanding is especially important for physics teachers in planning how and in what order to introduce concepts in teaching; connections which tie concepts to each other give direction of progress—there is “flux of information” so that what was learned before provides the basis for learning new ideas. In this study, we discuss how such ordering of concepts can be made visible by using concept maps and how they can be used in analysing the students’ views and ideas about the inherent logic of the teaching plans. The approach discussed here is informed by the recent cognitively oriented ideas of knowledge organisation concentrating on simple knowledge organisation patterns and how they form the basis of more complex concept networks. The analysis of such concept networks is then very naturally based on the use of network theory on analysing the concept maps. The results show that even in well-connected maps, there can be abrupt changes in the information flux in the way knowledge is passed from the initial levels to the final levels. This suggests that handling the information content is very demanding and perhaps a very difficult skill for a pre-service teacher to master.     

A PROBABILISTIC MODEL FOR STUDENTS’ ERRORS AND MISCONCEPTIONS ON THE STRUCTURE OF MATTER IN RELATION TO THREE COGNITIVE VARIABLES

In this study, the effect of 3 cognitive variables such as logical thinking, field dependence/field independence, and convergent/divergent thinking on some specific students’ answers related to the particulate nature of matter was investigated by means of probabilistic models. Besides recording and tabulating the students’ responses, a combination of binomial and multinomial logistic regression techniques was used to analyze the data. Thus, students’ misconceptions as well as the compatible-with-the-scientific-view student’s answers were explored one by one in relation to the above 3 cognitive variables. The study took place with the participation of 329 ninth-grade junior high school pupils (aged 14–15). The results showed that mostly logical thinking and sporadically the other 2 cognitive variables were significantly associated with students’ answers. Interpretation of the results and implications for science education are discussed.     

INDIGENOUS STUDENTS’ EXPERIENCES OF THE HIDDEN CURRICULUM IN SCIENCE EDUCATION: A CROSS-NATIONAL STUDY IN NEW ZEALAND AND TAIWAN

The tacit messages transmitted to indigenous learners in the science classroom provide a lens through which indigenous disengagement with school science can be better understood. In this paper, the findings of a cross-national comparative study conducted with indigenous Maori students in New Zealand and Seediq/Atayal students in Taiwan are discussed from a sociological perspective. The purposes of the present study were to explore the ways in which indigenous elementary school students in two industrialized nations experience the science curriculum and to identify the socialization processes through which patterns of indigenous under-achievement in science are maintained and reproduced. The findings suggest that the peripheral positioning of indigenous culture and knowledge within the science curriculum in developed nations underpins a series of tacit pedagogical codes that contribute to indigenous student disengagement with the subject.     

STUDENTS,STAFF, AND CURRICULUM IN A DAY TRAINING COLLEGE: A CASE STUDY OF UNIVERSITY COLLEGE,CARDIFF, 1890‐1914

The shift towards competitive examinations within the public service in nineteenth century Ireland must be viewed against the background of Ireland's colonial status and the thrust for national independence. Although the introduction of competitive examinations undoubtedly increased Catholic and nationalist access to government positions, the transition was limited by inequalities of access in the Irish educational system and by the Northcote‐Trevelyan civil service structure with its emphasis on an elite first division. The latter was a source of considerable resentment to many second division Irish civil servants. As a result, while political independence in 1922 resulted in considerable continuity of personnel and procedure from the British‐controlled civil service, there was a substantially greater emphasis on promotion from within the lower ranks of the civil service and a consequential division between the civil service elite of the new Irish state and the university sector.     

THE SURVIVORS,THE EMERGENCE OF A NEW COMMUNITY AND A SYSTEM OF ZIONIST EDUCATION IN GERMANY 1945–1950

I — Reminiscences Deuteronomy 32:7

Back in 1925, upon graduation from the Teachers Institute of Yeshiva University, I started my career as teacher in the first and oldest Talmud Torah in the United States, the Machzikey TT on East Broadway in Manhattan. I recall with pleasure how boys and girls spent ten hours a week in Jewish studies: giving the 12-13 year olds intensive instruction in Torah, Neviim, Mishnah, Hebrew Grammar, Hebrew Literature and Yiddish. For many years the Machzikey TT had a school enrollment of one thousand students and more. When the '30s came and the enrollment fell considerably, it became necessary to consolidate the school with the National Hebrew School, especially when the Downtown TT closed it doors.     

PRESERVICE TEACHERS’ EPISTEMOLOGICAL BELIEFS IN PHYSICS, CHEMISTRY, AND BIOLOGY: A MIXED STUDY

The purposes of the study were to assess preservice teachers’ domain-specific epistemological beliefs and to investigate whether preservice teachers distinguish disciplinary differences (physics, chemistry, and biology) in domain-specific epistemological beliefs. Mixed-method research design guided the present research. The researcher explored three epistemological dimensions: certainty and simplicity of knowledge, justification for knowing, and source of knowledge. Both quantitative and qualitative results suggested that a domain-specific epistemological beliefs system is a valid model to describe preservice teachers’ epistemological beliefs. In terms of epistemological beliefs, disciplinary differences in physics, chemistry, and biology were discussed in the last parts of the study.     

EVALUATING THE NEEDS OF A BIRMINGHAM SECONDARY SCHOOL'S TROUBLED STUDENTS AND THE SCHOOL'S WORKING RESPONSES TO THEM: ‘THE VALUE OF LISTENING’

Given the recent interest in attention difficulties or deficits, it is legitimate to enquire what would be considered “normal” in terms of the length of time on task that one would expect of an individual of a given age group.

This paper explores the issues surrounding selective attention and attention “types”, and conclude by setting down tentative guidelines for making judgements.     

KNOWLEDGE OF AND ATTITUDES TOWARD AGING IN YOUNG,MIDDLE‐AGED,AND OLDER COLLEGE STUDENTS: A COMPARISON OF TWO MEASURES OF KNOWLEDGE OF AGING

Scores on two measures of knowledge of aging were compared and correlated with direct and indirect measures of attitudes toward aging. Knowledge scores were not strongly related (r = .2‐.3) to either indirect or direct measures of attitudes toward older adults, and scores on the knowledge tests were not strongly correlated with each other (r = .25). In general, older subjects had higher knowledge scores and more positive attitude scores than did younger subjects. The age effect for knowledge remained after attitude was controlled. Suggestions for improving tests of general knowledge of aging are offered.