Comparison of teacher talk directed to boys and girls and its relationship to their behaviour in secondary and primary schools

There have been a number of earlier investigations, using differing methodologies, into the extent to which teachers in the secondary school interact with boys and girls and the results have suggested an imbalance in the teachers’ verbal behaviour towards the genders that is quite similar to the imbalance found in teachers’ behaviour in the primary school. The main aim of this study was to devise an investigation using the same methodology as that used in a recent primary school investigation in order to be able to make a fair comparison between the two levels. The results showed considerable differences in the teachers’ verbal behaviour towards the genders in the secondary school from that of teachers in the primary school. Where the primary school data showed teachers interacting more with the boys than the girls and the boys being less on‐task than the girls, the secondary school data showed no such differences.     

Real time search on the web: Queries,topics, and economic value

Real time search is an increasingly important area of information seeking on the Web. In this research, we analyze 1,005,296 user interactions with a real time search engine over a 190 day period. Using query log analysis, we investigate searching behavior, categorize search topics, and measure the economic value of this real time search stream. We examine aggregate usage of the search engine, including number of users, queries, and terms. We then classify queries into subject categories using the Google Directory topical hierarchy. We next estimate the economic value of the real time search traffic using the Google AdWords keyword advertising platform. Results shows that 30% of the queries were unique (used only once in the entire dataset), which is low compared to traditional Web searching. Also, 60% of the search traffic comes from the search engine’s application program interface, indicating that real time search is heavily leveraged by other applications. There are many repeated queries over time via these application program interfaces, perhaps indicating both long term interest in a topic and the polling nature of real time queries. Concerning search topics, the most used terms dealt with technology, entertainment, and politics, reflecting both the temporal nature of the queries and, perhaps, an early adopter user-based. However, 36% of the queries indicate some geographical affinity, pointing to a location-based aspect to real time search. In terms of economic value, we calculate this real time search stream to be worth approximately US $33,000,000 (US $33 M) on the online advertising market at the time of the study. We discuss the implications for search engines and content providers as real time content increasingly enters the main stream as an information source.     

What do they know?: An assessment of undergraduate library skills

This article, which examines variables affecting scores on a test of library skills, finds that the frequency with which students receive assignments requiring library research is the best predictor of a score. The unevenness is students' research skills has implications for bibliographic instruction.     

Physics Courses in the New Arizona Engineering Curriculum

To facilitate the adoption of a common core curriculum in the Schools of Engineering and of Mining at the University of Arizona, the general physics course for engineers has been dropped. The physical foundation for engineering is taught in a new series of courses in the Civil, Mechanical, Electrical Engineering, and Physics Departments as part of the common core. The Physics Department teaches atomic, molecular, nuclear, and solid-state physics in a seven-unit junior-level course. There are grounds for a re-examination of the role of physics in engineering education and perhaps for extensive changes. It is suggested, however, that the role is, and should remain, vital, in the interests of science, of engineering, and of education.