Validity and reliability of portfolio assessment in pre‐service teacher education

This article concentrates on the validity and reliability of portfolio assessment as used in pre‐service teacher education. It is not possible to make general pronouncements about the validity of portfolio assessment in pre‐service teacher education as there are multiple portfolio applications. The validity depends on the purpose, namely the divers competencies which the course organisers wish to assess with it. Therefore, three categories of competencies and consequently three types of portfolios were distinguished in order to determine the validity of portfolio assessment. For the assessment of teaching and partnership competencies, it is argued that the validity is low due to the roundabout nature of the assessment. On the contrary, the validity of portfolio assessment for learning competencies can be high. The execution of a self‐regulated learning process can be accurately assessed using portfolios. The reliability of portfolio assessment is problematic, since it is incapable of fulfilling the classic psychometric requirement of reliability. Nevertheless, provided that the necessary measures are taken, the reliability of portfolio assessment can still be brought to an acceptable level. Five measures are proposed.     

Connecting the continuum: a university-based induction program to improve teacher quality

The Summer Curriculum Writing Institute (SCWI) supports graduates of a university-based teacher education program during the induction years and beyond with the aim of impacting teacher quality. The purpose of this article is to describe the development, goals, research, and lessons learned during SCWI from 2005–12. The week focuses around the central task of curriculum development, building on foundations learned during preservice education, and includes opportunities for ongoing learning and reconnecting with cohort members. Studies of the program highlight five key aspects of the week – curriculum writing, time, maintaining and expanding professional networks, teacher efficacy, and teacher retention. Participants have shown increases in curriculum quality as well as classroom teaching retention rates. As numbers of participants continue to grow, SCWI appears a sustainable model for universities to continue supporting graduates during the induction years and beyond.     

Teacher use of the interactive whiteboards in Flemish secondary education—mapping against a transition framework

Interactive Whiteboards (IWBs) are a relatively new, but increasingly more common, tool in the classrooms of Flemish Secondary schools. This paper reports on research which attempted to map not only the amount of IWB use in Flemish secondary schools but, perhaps more importantly, to assess how they are used and the progress of teachers in developing their IWB skills in the classroom. An online quantitative survey was conducted, based on a detailed IWB transition framework. The survey (n?=?433) identified the distribution and usage levels of the IWB by teachers in Flemish Secondary Education. The results show that the distribution of IWBs is affected by the educational network to which a teacher belongs. In terms of the level of IWB use, teachers classified themselves predominantly in the first two stages of the transition framework (Black/Whiteboard Substitute and Apprentice use). This would suggest that teachers in Flemish Secondary Education have been initiated (in a technological sense) in using the IWB and are beginning to initiate (in a pedagogic sense) wider usage, including incorporating pupil use of the IWB. In this process, however, teachers appeared to be more confident in technical use of the ICT skills, but less confident in developing new pedagogic approaches which may exploit the full potential of the IWB.     

From Ends to Causes (and Back Again) by Metaphor: The Paradox of Natural Selection

Natural selection is one of the most famous metaphors in the history of science. Charles Darwin used the metaphor and the underlying analogy to frame his ideas about evolution and its main driving mechanism into a full-fledged theory. Because the metaphor turned out to be such a powerful epistemic tool, Darwin naturally assumed that he could also employ it as an educational tool to inform his contemporaries about his findings. Moreover, by using the metaphor Darwin was able to bring his theory in accordance with both the dominant philosophy of science in his time and the respected tradition of natural theology. However, as he introduced his theory of evolution by natural selection in On the origin of species in 1859, the metaphor also turned out to have a serious downside. Because of its intentional overtones, his contemporaries systematically misunderstood his metaphor not as a natural mechanism causing evolution to occur but as an agent who works towards particular ends. The difference in success between natural selection as an epistemic tool and its failure as an educational tool is labelled as a paradox. We explain the paradox from a cognitive perspective and discuss the implications for teaching evolution.     

Improving students’ representational flexibility in linear-function problems: an intervention

This study evaluates the effects of an intervention aimed at improving representational flexibility in linear-function problems. Forty-nine students aged 13–16 participated in the study. A pretest–intervention–posttest design with an experimental and control group was used. At pretest, both groups solved a choice test, where they could freely select a table, a graph, or a formula, and three no-choice tests, where they used predetermined representations. Twenty-five students in the experimental group were exposed to the intervention, where they learnt to fine-tune their choices both to the task at hand and to their own characteristics as representational users. The control group was not exposed to any intervention. The posttest was similar to the choice pretest. A flexibility score was calculated per student based on Siegler and Lemaire’s score. At posttest, the experimental group became more flexible than the control group. The impact of increased flexibility on problem-solving accuracy and speed is discussed.     

Interpreting histograms. As easy as it seems?

Histograms are widely used, but recent studies have shown that they are not as easy to interpret as it might seem. In this article, we report on three studies on the interpretation of histograms in which we investigated, namely, (1) whether the misinterpretation by university students can be considered to be the result of heuristic reasoning, (2) whether we could influence performance by stimulating or hindering the analytic processing of histograms, and (3) whether experts still show signs of this heuristic misinterpretation. We found that both university students and experts show signs of incorrect heuristic reasoning when comparing the mean of two data sets presented by histograms. Stimulating or hindering analytic processing did not affect performance. These indications of heuristic reasoning and the impossibility to affect this analytic processing suggest that the incorrect heuristic misinterpretation of histograms is very persistent. Implications for theory and methodology, scientific and educational practice are discussed.