Increasing the subject knowledge of trainee teachers

A number of potential entrants to teacher training in secondary science are deterred due to lack of breadth and depth in subject knowledge. This article outlines two Teacher Training Agency (TTA) sponsored approaches to enhancing the subject knowledge of trainee teachers during and prior to their formal training period

Why don't zombies like hibiscus tea? A multi-subject approach to photosynthesis through the use of Grätzel cells

Traditionally, photosynthesis has been seen as the domain of biology, with some input from chemistry when dealing with chromatography, while, apart from a passing reference to the colour of leaves, physics has tended to steer clear of the process that provides the lifeblood of human existence. This article outlines how a recent technological advance can be used as a teaching resource in all three branches of science

Triadic dialogue in oral communication tasks: What are the implications for language learning?

Asymmetry in classroom discourse, typified by teachers' frequent use of inauthentic initiating question turns, does not afford the best opportunities for the learning of language skills. More favourable conditions would appear to be associated with collaborative discourse patterns that display genuine interest in the child's contribution and build on, and respond to, the child's turn. Video-recordings were made of consecutive episodes of 'story-writing', 'speaking-book' and 'circle-time' activities to explore the sequential implications of the teachers'initiations across each task. During speaking-book the teacher initiates with topic initial elicitors which invite news, ideas or opinions from the child. In story-writing the teacher employs invitations, which call for the children to generate ideas or suggestions. Analysis of teacher follow-up turns demonstrates ways in which they recast and reformulate the children's response turns and elicit further material related to the pupils' agendas. By contrast, there is limited evidence of negotiation in the circle-time activity. The study demonstrates the potentially facilitative role played by triadic dialogue in language learning and therefore has professional significance for all those involved in the development of oral language skills in classrooms. © 2006 J. Radford et al

A simple, efficient, mass-conservative approach to solving Richards' equation (openRE, v1.0)

A simple numerical solution procedure – namely the method of lines combined with an off-the-shelf ordinary differential equation (ODE) solver – was shown in previous work to provide efficient, mass-conservative solutions to the pressure-head form of Richards' equation. We implement such a solution in our model openRE. We developed a novel method to quantify the boundary fluxes that reduce water balance errors without negative impacts on model runtimes – the solver flux output method (SFOM). We compare this solution with alternatives, including the classic modified Picard iteration method and the Hydrus 1D model. We reproduce a set of benchmark solutions with all models. We find that Celia's solution has the best water balance, but it can incur significant truncation errors in the simulated boundary fluxes, depending on the time steps used. Our solution has comparable runtimes to Hydrus and better water balance performance (though both models have excellent water balance closure for all the problems we considered). Our solution can be implemented in an interpreted language, such as MATLAB or Python, making use of off-the-shelf ODE solvers. We evaluated alternative SciPy ODE solvers that are available in Python and make practical recommendations about the best way to implement them for Richards' equation. There are two advantages of our approach: (i) the code is concise, making it ideal for teaching purposes; and (ii) the method can be easily extended to represent alternative properties (e.g., novel ways to parameterize the K(ψ) relationship) and processes (e.g., it is straightforward to couple heat or solute transport), making it ideal for testing alternative hypotheses

Ability grouping practices in the primary school: A survey

In 1997, the DfEE suggested that schools should consider 'setting' pupils by ability as it was believed that this would contribute to raising standards. This survey of primary schools aimed to establish the extent to which primary schools, with same and mixed age classes, implement different grouping practices including setting, streaming, within class ability and mixed ability groupings for different curriculum subjects. Schools were asked to complete a questionnaire indicating their grouping practices for each subject in each year group. The findings showed that schools predominantly adopted within class ability groupings, either mixed or ability grouped, for most subjects. Ability grouping (within class and setting) was most common in mathematics, followed by English and science. Its implementation increased as pupils progressed through school. The type of setting adopted, same or cross-age, tended to reflect the nature of the class structures within the school

Systematic review of health-related quality of life and patient-reported outcome measures in Gestational Trophoblastic Disease: A parallel synthesis approach

Gestational Trophoblastic Disease (GTD) is a rare complication of pregnancy that can develop into cancer. Medical outcomes are well researched but evidence is required on the impact of GTD on health-related quality of life (HRQoL) to improve care. The review was conducted to determine the impact of GTD and its treatment on HRQoL and identify how HRQoL is measured and appropriateness of these measures. Quantitative studies found HRQoL in long-term survivors to be at or above population norms. GTD appeared to have a negative impact on HRQoL where patients experience physical, psychological and social sequelae related to the condition. Clinically significant levels of anxiety, depression, sexual dysfunction and fertility-related distress were found. The results should be treated with caution because the evidence base was limited to small heterogeneous samples, retrospective data and the wide range of measures used. Within the qualitative data, new themes emerged including nerve damage, fatigue, amenorrhea, and grief. Currently, these areas are not captured in patient reported outcome measures (PROMs) and the content may not be valid for this population. Further qualitative research could lead to development of a GTD specific PROM providing reliable, meaningful and valid assessments and allowing longitudinal data to be obtained

Using the Sound Card as a Timer

Experiments in mechanics can often be timed by the sounds they produce. In such cases, digital audio recordings provide a simple way of measuring time intervals with an accuracy comparable to that of photogate timers. We illustrate this with an experiment in the physics of sports: to measure the speed of a hard-kicked soccer ball.Comment: 3 pages, 4 figures, Late

Communicating with Citizens on the Ground: A Practical Study

Availability and access to information is critical for a highly effective response to an ongoing event however, information reported by citizens is based on their context, bias and subjective interpretation, and the channel of communication may be too narrow to provide clear, accurate reporting. This can often lead to inadequate response to an emergency, which can in turn result in loss of property or even lives. Excessive response to an emergency can also result in a waste of highly resources. Our solution to address this problem is to make the citizen act as a camera for the control room by exploiting the user’s mobile camera. The system is designed to provide a live view of the citizen’s immediate surroundings, while control room personnel can provide instructions. In this paper, we introduce our approach and share initial insights from a focus group validation session and then four evaluations with users within a separate but closely related domain. We discuss our observations, evaluation results and provide a set of recommendations for the Emergency Response domain