Secondary school physics teachers' conceptions of scientific evidence: An exploratory case study

This article describes an exploratory case study of secondary school physics teachers' conceptions of scientific evidence. The nature of teachers' conceptions of evidence was derived from an analysis of data collected from 1 preservice and 2 in‐service teachers. Each teacher responded to a series of research prompts in multiple interviews and handwritten tasks. In these research prompts, the teachers thought aloud while designing experiments and critically evaluating student‐collected data as presented in hypothetical classroom scenarios. Spoken and written data were recorded. The data set was coded and analyzed using standard qualitative analysis techniques. Data from this study suggest that, while contemplating the reliability and validity of hypothetical student‐generated scientific evidence, the teachers frequently intertwined conceptions of evidence with subject matter concepts centrally relevant to the hypothetical investigation. Data also indicate that the relationship between subject matter knowledge and conceptions of evidence was more pronounced for some conceptions of evidence than for others. Results suggest that a fuller study is warranted. Suggestions for future research include exploring such relationships in other physics content areas as well as other scientific disciplines. Implications for science teacher education suggest that science and science methods courses should encourage preservice teachers to engage in original scientific research, as well as participate in peer review and critique. © 2003 Wiley Periodicals, Inc. J Res Sci Teach 40: 721–736, 2003     

Effect of acquisition rates on off‐task behavior of kindergarten students while learning sight words

Assessing a student's acquisition rates (ARs) is a reliable way to determine how many new words should be taught in one lesson without reducing retention. Exceeding a student's AR can result in frustration and problem behaviors. The purpose of this study was to examine the effect of AR on the off‐task behavior of kindergarten students while participating in a commonly used sight‐word instruction video. Participants included 39 kindergarten students whose ARs were assessed before showing the sight‐word video. Behavior was measured as on‐ and off‐task using momentary time‐sampling with 10‐s intervals. Results indicated that students' time off task increased after exceeding their ARs, with a noticeable immediate increase. The implications and limitations of these results are discussed.     

Research and Teacher Education: A British Perspective

The title of a lecture or address is often the least important part of it. Sometimes, indeed, it is almost an after-thought. In the case of my address today, however, the words of the title are important. What one puts between ‘research’ and ‘teacher education’ — on, or and, or in – makes a great deal of difference to the subject matter.     

Teacher epistemology and scientific inquiry in computerized classroom environments

A 20-week classroom-based study was conducted to investigate the extent to which a computerized learning environment could facilitate students' development of higher-level thinking skills associated with scientific inquiry. In two classes students' interactions with a scientific data base—Birds of Antarctica—were closely monitored, and the mediating roles of the teachers' epistemologies were examined. Interpretive data were generated and analyzed in relation to a constructivist perspective on learning. In the class where the teacher implemented a constructivist-oriented pedagogy, students took advantage of enhanced opportunities to generate creative questions and conduct complex scientific investigations. These higher-level thinking skills were much less evident in the class in which a more transmissionist-oriented pedagogy prevailed. The results of the study suggest that it is not the computer itself that facilitates inquiry learning; the teacher's epistemology is a key mediating influence on students' use of the computer as a tool of scientific inquiry.     

The Effects of Antecedent Cues on Teachers’ and Mental Health Workers’ Perceptions of Students’ Life Event Stressors

This study examined point‐in‐time and point‐of‐view antecedent cue effects on teachers’ and mental health workers’ perceptions of life events’ impact on students. Increased congruence between student and adult perceptions of life events’ impact was demonstrated via systematic variation of cue conditions designed to limit the contribution of historical and personal referents. Implications are discussed in terms of future research and training efforts.     

Portfolios, Accountability, and an Interpretive Approach to Validity

How can the results of classroom-based portfolio assessment be communicated outside the classroom? How might a portfolio-based assessment system be designed and implemented? How can we evaluate the merits of portfolio-based assessments?