Improving educational web search for question-like queries through subject classification

Students use general web search engines as their primary source of research while trying to find answers to school-related questions. Although search engines are highly relevant for the general population, they may return results that are out of educational context. Another rising trend; social community question answering websites are the second choice for students who try to get answers from other peers online. We attempt discovering possible improvements in educational search by leveraging both of these information sources. For this purpose, we first implement a classifier for educational questions. This classifier is built by an ensemble method that employs several regular learning algorithms and retrieval based approaches that utilize external resources. We also build a query expander to facilitate classification. We further improve the classification using search engine results and obtain 83.5% accuracy. Although our work is entirely based on the Turkish language, the features could easily be mapped to other languages as well. In order to find out whether search engine ranking can be improved in the education domain using the classification model, we collect and label a set of query results retrieved from a general web search engine. We propose five ad-hoc methods to improve search ranking based on the idea that the query-document category relation is an indicator of relevance. We evaluate these methods for overall performance, varying query length and based on factoid and non-factoid queries. We show that some of the methods significantly improve the rankings in the education domain.     

Development and validation of Children’s Responsible Environmental Behavior Scale

Though environmentally responsible behavior (ERB) has been a focus of many studies in the field of environmental education, very few scales have been developed to assess children’s ERB. In this regard, this article focuses on the development and validation of Children’s Responsible Environmental Behavior Scale (CREBS) and also reports the psychometric properties of this scale. The items in the CREBS were developed initially from the responses to four open-ended items by 229 fourth and fifth grade students. This initial form was pilot tested with 673 fourth and fifth graders and then subjected to exploratory factor analysis. Later, the revised version of the scale was administrated to 2412 fifth graders, and those results were subjected to confirmatory factor analysis and reliability analysis. CREBS consists of 23 items measured using a seven-point Likert-type scale, which have been organized into four sub-scales: political action (six items, α?=?.92); eco-management (six items, α?=?.70); consumer and economic action (five items, α?=?.70); and Individual and Public Persuasion (six items, α?=?.80). Study results indicate that CREBS can be used for exploring the extent to which elementary school students in Turkey demonstrate four types of behavior to help prevent and resolve environmental problems and issues.     

Pre-service and in-service teachers’ beliefs about teaching and learning chemistry in Turkey

This paper describes beliefs held about teaching and learning chemistry by Turkish teachers and student-teachers. The study investigated different aspects of pre-service and in-service teachers’ belief structures. Part of the study examined teachers’ overall beliefs, based on participants’ drawings of classroom situations. A qualitative evaluation was employed to offer information on (student-)teachers’ beliefs about classroom organisation, their beliefs about teaching objectives, and their stance on epistemological beliefs. Beliefs ranged from very traditional, teacher-centred ideas to modern, student-centred ones. Data evaluation was triangulated using a quantitative approach, which focused on whether beliefs were characterised by either teacher-centredness or learner-centredness. Additionally, a Likert questionnaire was used to evaluate the educators` beliefs about the nature of good education. The results for the group of participants are presented and compared. Implications for chemistry teacher education in Turkey will also be addressed.     

Prospective teachers’ perceptions on different aspects of portfolio

This qualitative–case study examined how portfolio and portfolio assessment were perceived by prospective teachers. The participants were 23 prospective teachers from seven different teaching areas from a Turkish university. A semi-structured individual interview was conducted. The interview schedule included 15 open-ended questions. The main results emerged from content analysis were that prospective teachers perceived portfolio as a learning and an assessment tool. Further, they believed that portfolio was complementary rather than an alternative assessment method to traditional assessment procedures.     

BELIEFS ABOUT CHEMISTRY TEACHING AND LEARNING—A COMPARISON OF TEACHERS’ AND STUDENT TEACHERS’ BELIEFS FROM JORDAN,TURKEY AND GERMANY

This paper discusses beliefs about teaching and learning chemistry. The sample includes chemistry student teachers and in-service teachers from Jordan, Turkey, and Germany. Two test instruments were used to investigate (student) teachers’ beliefs. A qualitative instrument was used to explore Beliefs about Classroom Organization, Beliefs about Teaching Objectives, and Epistemological Beliefs. A quantitative instrument was added to evaluate participants’ beliefs concerning the Nature of Good Education. The results show that Jordanian chemistry teachers and teacher trainees held the most traditional, teacher-centered, and transmission-oriented beliefs, while the German sample showed the most modern beliefs toward teaching and learning. Turkish (student) teachers evidenced more moderate beliefs, which tended to be between the two extremes, but that could still be positioned more closely to the traditional way of thinking. The results are discussed in the context of chemistry teacher education in the three respective countries.     

Content analysis of selected features of K‐8 environmental education research studies in Turkey, 1997–2007

This study aimed to analyze environmental education research (EER) in Turkey conducted in Grades K‐8 and published over the years 1997–2007. Due to the fact that there had been no systematic reviews of EER in Turkey prior to this time period, it was more appropriate to explore the implications of the results of this review for research policies and practices than for educational policies and practices in Grades K‐8. A substantial search of the international and national literature revealed 53 studies that fit the time frame and study characteristics. Three analyses of these studies were undertaken: (a) features of the research method; (b) socio‐demographic characteristics of the subjects; and (c) components of environmental literacy assessed. Three charts were constructed to support these analyses; e.g., one for each analysis. For analysis (a), quantitative surveys were the most common method. For analysis (b), greater attention was paid to the age, grade level, gender and residence of participating students. For analysis (c), greater attention was paid to knowledge of ecology and natural history, and knowledge of environmental problems and issues, less attention was paid to components of affect, and very little attention was paid to socio‐political‐economic knowledge, cognitive skills and environmentally responsible behavior.     

Paper-based and computer-based concept mappings: The effects on computer achievement, computer anxiety and computer attitude

The purpose of this paper is to compare the effects of paper-based and computer-based concept mappings on computer hardware achievement, computer anxiety and computer attitude of the eight grade secondary school students. The students were randomly allocated to three groups and were given instruction on computer hardware. The teaching methods used for each group were the conventional method, paper-based concept mapping and computer-based concept mapping. At the end of a 4-week instruction, posttests were administered to assess computer hardware achievement, computer anxiety and computer attitude of the students. The findings indicate that paper-based and computer-based concept mapping strategies produce better results than the conventional method. However, the effects of paper-based and computer-based concept mapping strategies were not significantly different.     

Teachers’ emergent goals in spreadsheet-based lessons: analyzing the complexity of technology integration

We examine teachers’ classroom activities with the spreadsheet, focusing especially on episodes marked by improvisation and uncertainty. The framework is based on Saxe’s cultural approach to cognitive development. The study considers two teachers, one positively disposed towards classroom use of technology, and the other not, both of them experienced and in a context in which spreadsheet use was compulsory: a new curriculum in France for upper secondary non-scientific classes. The paper presents and contrasts the two teachers in view of Saxe’s parameters, and analyzes their activity in two similar lessons. Goals emerging in these lessons show how teachers deal with instrumented techniques and the milieu under the influence of cultural representations. The conclusion examines the contribution that the approach and the findings can bring to understanding technology integration in other contexts, especially teacher education.

Development and Validation of an Instrument to Measure University Students’ Biotechnology Attitude

The impact of biotechnologies on peoples’ everyday lives continuously increases. Measuring young peoples’ attitudes toward biotechnologies is therefore very important and its results are useful not only for science curriculum developers and policy makers, but also for producers and distributors of genetically modified products. Despite of substantial number of instruments which focused on measuring student attitudes toward biotechnology, a majority of them were not rigorously validated. This study deals with the development and validation of an attitude questionnaire toward biotechnology. Detailed information on development and validation process of the instrument is provided. Data gathered from 326 university students provided evidence for the validity and reliability of the new instrument which consists of 28 attitude items on a five point likert type scale. It is believed that the instrument will serve as a valuable tool for both instructors and researchers in science education to assess students’ biotechnology attitudes.