How to Assess and Categorize Teachers’ Views of Science? Two Methodological Issues

Research in Science Education - This paper addresses two methodological issues related to the assessment of teachers’ views of science. The first concerns the distinction between the...     

Hierarchical clustering of a Finnish newspaper article collection with graded relevance assessments

Search facilitated with agglomerative hierarchical clustering methods was studied in a collection of Finnish newspaper articles (N = 53,893). To allow quick experiments, clustering was applied to a sample (N = 5,000) that was reduced with principal components analysis. The dendrograms were heuristically cut to find an optimal partition, whose clusters were compared with each of the 30 queries to retrieve the best-matching cluster. The four-level relevance assessment was collapsed into a binary one by (A) considering all the relevant and (B) only the highly relevant documents relevant, respectively. Single linkage (SL) was the worst method. It created many tiny clusters, and, consequently, searches enabled with it had high precision and low recall. The complete linkage (CL), average linkage (AL), and Ward's methods (WM) returned reasonably-sized clusters typically of 18–32 documents. Their recall (A: 27–52%, B: 50–82%) and precision (A: 83–90%, B: 18–21%) was higher than and comparable to those of the SL clusters, respectively. The AL and WM clustering had 1–8% better effectiveness than nearest neighbor searching (NN), and SL and CL were 1–9% less efficient that NN. However, the differences were statistically insignificant. When evaluated with the liberal assessment A, the results suggest that the AL and WM clustering offer better retrieval ability than NN. Assessment B renders the AL and WM clustering better than NN, when recall is considered more important than precision. The results imply that collections in the highly inflectional and agglutinative languages, such as Finnish, may be clustered as the collections in English, provided that documents are appropriately preprocessed.     

School Leadership in the 21st Century: Leading in the Age of Reform

In an effort to increase student readiness for college and career, many States have adopted new academic standards encouraged by education reform advocates. These standards are commonly referred to as the Common Core Standards. Schools from States that have adopted the Common Core Standards have been compelled to significantly restructure their existing curriculum and adjust how they teach that curriculum. These requirements can be particularly onerous for rural schools. Neoliberalism is the underlying political philosophy undergirding these changes in the current school reform movement and is similar to the political philosophy that drove the changes in agricultural policies in the mid 20th century. Neoliberal political and economic philosophy as it correlates to education policy is buttressed by three values: (1) education fosters economic growth; (2) education policy modeled on efficiency and business practices; (3) high stakes testing to measure what a student has learned. These values have created an educational policy structure that attempts to quantify student learning, teacher effectiveness and school district value. By understanding the similarities between agricultural policies in the mid 20th century and current education policies, rural schools and communities will be able to change the narrative surrounding the education of their children.