Instructional Design Students’ Design Judgment in Action

This case study examines the design practices of instructional design (ID) students while working on a realistic design project (Joel, 1987) to explore whether ID students make design judgments; how, when, and where they are making them; and what kinds of judgments they make during a realistic instructional design process. The perspective taken in this study is that design judgments comprise multiple, complex types and are not confined to moments of overt decision making (Nelson & Stolterman, 2012). In this small‐scale case study, a group of students was observed in the process of designing instruction within a semester. The findings of the study suggest that these ID students continuously made design judgments of many kinds throughout the design process.     

Effects of jigsaw and animation techniques on students’ understanding of concepts and subjects in electrochemistry

This study investigated the effect of jigsaw cooperative learning and animation versus traditional teaching methods on students’ understanding of electrochemistry in a first-year general chemistry course. This study was carried out in three different classes in the department of primary science education during the 2007–2008 academic year. The first class was randomly assigned as the jigsaw group, the second as the animation group, and the third as the control group. Students participating in the jigsaw group were divided into five “home groups” since the topic electrochemistry is divided into five subtopics. Each of these home groups contained four students. The groups were as follows: (1) Home Group A (HGA), representing the fundamental concepts of electrochemistry, (2) Home Group B (HGB), representing the electrochemical cell and energy source, (3) Home Group C (HGC), representing electrolysis, (4) Home Group D (HGD), representing Faraday’s laws, and (5) Home Group E (HGE), representing corrosion. The home groups broke apart, like pieces of a jigsaw puzzle, and the students moved into jigsaw groups consisting of members from the other home groups, who were each assigned a subtopic. For students in the animation group, their lesson focused on explaining the step-by-step process of electrochemistry through a computer-animated presentation. The main data collection tools were the Test of Scientific Reasoning and the Particulate Nature of Matter Evaluation Test. The results indicated that the jigsaw and animation groups achieved better results than the control group.     

School Students’ Conceptions about Biodiversity Loss: Definitions, Reasons, Results and Solutions

Environmental degradation stemming from anthropocentric causes threatens the biodiversity more than ever before, leading scholars to warn governments about the impending consequences of biodiversity loss (BL). At this point, it is of great importance to study the public’s conceptions of BL in order to identify significant educational implications. However, a review of the literature reveals a relatively small body of research about the public understanding of BL. In this qualitative study, we thus strived to elicit Turkish school students’ conceptions about BL using a written questionnaire including open-ended questions with respect to the definition of biodiversity as well as reasons for, results of and solutions to BL. The sample consisted of 245 school students in a relatively small city. A two-staged content analysis was run on the responses. The results showed that school students most commonly preferred species-focused definitions of biodiversity and understood BL through such various conceptual patterns as, ‘balance of nature’, ‘forest’, ‘global warming’, ‘hunting’ and ‘indirect conservation’. At the end of the paper, the possible educational implications and future perspectives were discussed.     

Preservice Science Teachers’ Efficacy Regarding a Socioscientific Issue: A Belief System Approach

The aim of the present study was to understand the nature of teaching efficacy beliefs related to a socioscientific issue (SSI). We investigated Turkish preservice science teachers’ teaching efficacy beliefs about genetically modified (GM) foods using a belief system approach. We assumed that preservice teachers’ beliefs about GM foods (content knowledge, risk perceptions, moral beliefs, and religious beliefs) and their teaching efficacy beliefs about this topic constitute a belief system, and these beliefs are interrelated due to core educational beliefs. We used an exploratory mixed design to test this model. We developed and administered specific questionnaires to probe the belief system model. The sample for the quantitative part of this study included 441 preservice science teachers from eight universities. We randomly selected eight participants in this group for follow-up interviews. The results showed that preservice science teachers held moderately high teaching efficacy beliefs. Learning and teaching experiences, communication skills, vicarious experiences, emotional states, and interest in the topic were sources of this efficacy. In addition, content knowledge and risk perceptions were predictors of teaching efficacy. We believe that epistemologies based on traditional teaching and the values attached to science teaching are the core beliefs that affect the relationship between predictor variables and teaching efficacy.     

First Year Turkish Science Undergraduates’ Understandings and Misconceptions of Light

The present study aims to identify first year Turkish Science undergraduates’ understandings and misconceptions of the concept of light and its propagation. For this purpose, an instrument composed of four open-ended questions was developed by the researchers. The diagnostic test was piloted with twenty students and modifications were made prior to the final administration of the test. The content validity of the test questions was assessed by two physics researchers and one lecturer. These questions were administered to a hundred first year undergraduates (aged 16–18) enrolled in the Science Teacher Training Department in Ataturk University in Turkey. In addition, the semi-structured interviews of 30–40 min were conducted with the four students whose responses involved common misunderstanding. All interview records were transcribed and analysed. The findings showed that undergraduates’ understanding of light is poor and also they have important and prevalent misconceptions. Identified misconceptions, some of which have been reported in the literature, are discussed qualitatively. The misunderstandings identified were compared with those in the literature. The results have some implications for teaching light, suggesting that a substantial revision of teaching strategies is needed.

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Investigation of ABCA1 C69T polymorphism in patients with type 2 diabetes mellitus

Introduction:

Non insulin dependent diabetes mellitus is the most common type of diabetes. Genetic factors, lipid profiles, hypertension are potential risk factors for diabetes mellitus. Adenosine binding cassette transporter proteins 1 (ABCA1) plays a role in cholesterol metabolism, especially high density lipoprotein (HDL-cholesterol). There are multiple mechanisms by which HDL-cholesterol can be atheroprotective, it is clear that the relative activity of ABCA1 plays a major role. We aimed to investigate association of ABCA1 C69T gene polymorphism with lipid levels in Turkish type 2 diabetic patients.

Materials and methods:

After isolation of DNA by ethanol precipitation we determined ABCA1 gene polymorphism by using polimerase chain reaction - restriction fragment lenght polymorphism (PCR-RFLP) method in 107 type 2 diabetic patients and 50 healthy controls.

Results:

We have observed that the frequency of TT genotype is significantly higher in healthy controls compared to patients (14% vs. 3%; P = 0.008). Also frequency of T allele was higher in controls than in patients (34% vs. 21%; P = 0.020; OR (95% CI) = 0.52 (0.30–0.88)). There was no association of lipid levels and ABCA1 C69T polymorphism subgroups.

Conclusion:

We have found significantly higher frequency of both T allele and genotype in control group when compared to patients that made us think that T allele may be a protective factor against diabetes mellitus. But, we could not find a relationship between genotypes and lipid concentrations in our two groups. Larger studies will help us to understand the relationship between ABCA1 C69T genotype and lipid parameters in diabetes mellitus.     

Student leadership in small group science inquiry

Background: Science educators have sought to structure collaborative inquiry learning through the assignment of static group roles. This structural approach to student grouping oversimplifies the complexities of peer collaboration and overlooks the highly dynamic nature of group activity.

Purpose: This study addresses this issue of oversimplification of group dynamics by examining the social leadership structures that emerge in small student groups during science inquiry.

Sample: Two small student groups investigating the burning of a candle under a jar participated in this study.

Design and method: We used a mixed-method research approach that combined computational discourse analysis (computational quantification of social aspects of small group discussions) with microethnography (qualitative, in-depth examination of group discussions).

Results: While in one group social leadership was decentralized (i.e., students shared control over topics and tasks), the second group was dominated by a male student (centralized social leadership). Further, decentralized social leadership was found to be paralleled by higher levels of student cognitive engagement.

Conclusions: It is argued that computational discourse analysis can provide science educators with a powerful means of developing pedagogical models of collaborative science learning that take into account the emergent nature of group structures and highly fluid nature of student collaboration.     

Stickers to Facts,Imposers, Democracy Advocators,and Committed Impartialists: Preservice Science Teachers’ Beliefs About Teacher’s Roles in Socioscientific Discourses

For science teachers using the discourse of socioscientific issues (SSI), it is important to make a decision as to whether when and how to disclose their own positions. The existing limited literature shows that science teachers prefer one of four roles during SSI discourse: sticker to facts, imposer, democracy advocator, and committed impartialist. The purpose of the present research is to understand the nature of preservice science teachers’ (PST) beliefs underlying such selection. Based on existing literature, we developed a teacher’s belief questionnaire including vignettes representing four teacher’s roles in discussion of genetically modified (GM) foods. Three hundred twenty-four (324) PSTs from a Turkish context experiencing SSI-based reforms completed these questionnaires, selected one of the teacher’s roles, and justified their selection by writing reasons. Content analysis procedures were used in data analysis of this qualitative study. The results show that most PSTs selected dialogical roles (democracy advocators and committed impartialists). Looking at their beliefs, epistemologies and teaching goals work together in PSTs’ selection of their preferred role. In addition, we argue that there is no desired alignment between teachers’ existing beliefs and expectations of SSI reforms. We conclude by indicating certain implications that may enhance such alignment.