An Experiment in Teaching Ratio and Proportion

This paper summarizes our analysis of the complexity of ratio problems at Grades 6 and 7, and reports a two-year experiment related to the teaching and learning of rational numbers and proportionality in these grades. Two classes were followed and observed. Part of the teaching material was common to both classes, mainly the objectives and the corpus of ratio problems in a physical context. But in one class, here called “Partial-experiment”, the learning environment was exclusively a paper-pencil one and the teacher followed his usual method in designing and conducting teaching sequences. In the other class, here called “Full-experiment”, the teaching was based on a framework, emerging from our analysis of complexity of ratio problems, involving precise guidelines and a specific computer environment. Using a pre-test and a post-test, we observed clear progress in both classes compared to a sample of “standard” pupils. Our comparative pupil-oriented study indicates more complete improvement in the “full-experiment” class, i.e., a better acquisition of fractions and their use for solving usual proportionality problems. The average pupil’s progress is greater in the “full experiment”, with the pupils who were initially high- or low-level attainers benefiting the most from the “full-experiment”.     

Secondary school teachers’ perspectives on teaching about topics that bridge science and religion

The question of where to locate teaching about the relationships between science and religion has produced a long-running debate. Currently, science and religious education (RE) are statutory subjects in England and are taught in secondary schools by different teachers. This paper reports on an interview study in which 16 teachers gave their perceptions of their roles and responsibilities when teaching topics that bridge science and religion and the extent to which they collaborated with teachers in the other subject areas. We found that in this sample, teachers reported very little collaboration between the curriculum areas. Although the science curriculum makes no mention of religion, all the science teachers said that their approaches to such topics were affected by their recognition that some pupils held religious beliefs. All the RE teachers reported struggling to ensure students know of a range of views about how science and religion relate. The paper concludes with a discussion about implications for curriculum design and teacher training.     

Changes in swimming technique during time to exhaustion at freely chosen and controlled stroke rates

Abstract

The aim of this study was to assess technical changes during constrained swimming in time-to-exhaustion tests. Ten swimmers of national standard performed a maximal 400-m front crawl and two sets of exhaustion tests at 95%, 100%, and 110% of mean 400-m speed. In the first set (free), swimmers had to maintain their speeds until exhaustion and mean stroke rate was recorded for each test. In the second set (controlled), the same speed and individual corresponding stroke rate were imposed. The durations of the exhaustion tests, relative durations of the stroke phases, and arm coordination were analysed. For each speed in the “controlled” set, the exhaustion tests were shorter. Moreover, variables were consistent, suggesting a stabilization of stroke technique. Under the free condition, stroke rate increased to compensate for the decrease in stroke length. At the same time, swimmers reduced the relative duration of their non-propulsive phases in favour of the propulsive phases. Thus, swimmers changed their arm coordination, which came close to an opposition mode. These two constraints enable swimmers both to maintain their stroking characteristics and develop compensatory mechanisms to maintain speed. Moreover, stroke rate can be seen as a useful tool for controlling arm technique during paced exercise.     

The Importance of “Focusness”: Focus Groups as a Means of Collection Management Assessment

ABSTRACT

In order to assess the Library's collection, the Collection Development Assessment Team at Cleveland State University used focus groups to complement the information gathered in LibQUAL+?. Groups of undergraduates, graduates, and faculty participated in four separate focus groups. All groups reported they were essentially satisfied with the collection but also wanted better local collections and used OhioLINK to supplement their research; fewer users also utilized the rich resources of the public library systems. In keeping with previous surveys, all groups wanted more full-text available electronically, faster access to materials, and a more navigable website. It appeared that the more sophisticated the user, the more satisfied they were with the collection. The Special Collections focus group would like to have more materials digitized, improved accessibility to the collection and website, and increased interaction with the community to heighten awareness of the collection and in order to gather more primary materials for the collection.     

Maternal scaffolding of attention between 5 and 8 months

Infants’ abilities to focus attention on objects and mothers’ behaviors mobilizing the attention of their child were studied in a sample of 30 dyads, at 5 and 8 months of age. It was hypothesized that at the younger age infants need their mothers’ scaffolding to explore their environment, and that the frequency of mothers’ encouragements at that age is related with their attentional capacities at 8 months; at this later age, mother’s and infant’s behaviors should no more be correlated. Data concerning both the total frequency of the target behaviors and the length of individual occurrences strongly confirm the hypotheses. They imply that in the mother attention getting should be distinguished from attention holding, and are discussed in terms of educational consequences.