Learning a mathematical concept from comparing examples: the importance of variation and prior knowledge

In experiment 1, novice fourth-grade students (N????2) who compared multiple examples that separately varied each critical aspect and then simultaneously varied all critical aspects developed better conceptual knowledge about the altitude of a triangle than students who compared multiple examples that did not separately vary each critical aspect but simultaneously varied all critical aspects. In experiment 2, this pattern was the same for fourth-grade students (N????0) but not for sixth-grade students (N????4) who had greater prior knowledge about the concept. Aspects that are critical for learning should be varied first separately and then simultaneously, and students with different levels of prior knowledge may perceive different aspects as critical for their learning and thus benefit differently from the identical instruction.     

重拾文学阅读的初衷——浅析“香港文学深度体验”计划的实践

阐明“香港文学深度体验”计划的构思,并详细介绍文学景点考察、学校经验分享会及文学夏令营的内容,藉此说明文学散步与文学阅读的关系,为推广文学阅读探寻更多可能。     

Globalisation and localisation enmeshed—towards a framework for the development of guidance curriculum in Hong Kong

Hong Kong’s 150 years of colonisation by the British is a classic example of how globalisation comes into direct contact with a local Chinese culture and creates cultural hybridities. The paper presents a framework for developing a hybrid guidance curriculum, drawing together western traditions of developmental contextualism in guidance and Chinese traditions of Confucian humanism in moral education. The core of the framework is a hybrid self, integrating the individualist and the embedded self. The paper highlights the importance of culture and context in considering school guidance and the ‘fluid’ and dynamic nature of ‘glocalisation’ working towards integration.     

Four Types of School Environment: Multilevel Self-Management and Educational Quality

How school-based management in the form of multilevel self-management is related to educational quality is a crucial issue in current educational reforms. An empirical study was conducted to explore this issue in a sample of 68 primary schools in Hong Kong. It was found that the school environment of sampled schools could be classified into 4 types: Bottom-level Self-Managing (BSM), Top-level Self-Managing (TSM), Mediocre Self-Managing (MSM), and Poor Self-Managing (PSM). The performances of the school, groups, and individual teachers among these 4 types were significantly different. Some implications were drawn for practice and policy formulation.     

Exploring an experiential learning project through Kolb's Learning Theory using a qualitative research method

Experiential learning pedagogy is taking a lead in the development of graduate attributes and educational aims as these are of prime importance for society. This paper shows a community service experiential project conducted in China. The project enabled students to serve the affected community in a post-earthquake area by applying their knowledge and skills. This paper documented the students’ learning process from their project goals, pre-trip preparations, work progress, obstacles encountered to the final results and reflections. Using the data gathered from a focus group interview approach, the four components of Kolb's learning cycle, the concrete experience, reflection observation, abstract conceptualisation and active experimentation, have been shown to transform and internalise student's learning experience, achieving a variety of learning outcomes. The author will also explore how this community service type of experiential learning in the engineering discipline allowed students to experience deep learning and develop their graduate attributes.     

Experimental verification of Faradaic charging in ac electrokinetics

This paper investigates the phenomenon of Faradaic charging in ac electrokinetics. Faradaic reactions were suggested as a key effect responsible for the reversal of pumping direction in ac micropumps. However, this hypothesis has yet to be proven convincingly and directly. Here we present an ion detection strategy to determine the production of ions through Faradaic hydrolytic reactions originating from direct application of voltage to electrolytic solutions during ac electrokinetics. Experiments were performed with symmetrical planar electrodes aligned along a microfluidic channel. Fluorescein, a pH-dependent dye, was employed as the pH indicator for the detection of ion production. Images were captured for analysis at various voltage levels. From analyzing the fluorescence intensity and its distribution, it can be concluded that the production of ions from hydrolytic reactions takes place and increases with the ac voltage. The coefficient of deviation indicates a significant enhancement at ac voltage above 11 V_pp. Lastly, we demonstrate a strategy using dc-biased ac electrokinetics to achieve controllability in direction and magnitude of the net fluid flow in pumping application.     

Women teachers in Hong Kong: stories of changing gendered identities

In a time of mass schooling in most parts of the world, the discourse of the “woman primary teacher” is often the subject of discourse. Yet most stories of these women teachers emerge from other (Western) contexts, with little known about how changing education processes affect the gendered identities of women in other cultural settings. This paper explores how women teachers negotiate their gendered identities in Hong Kong, where modernization has already mingled with the indigenous Chinese culture. It provides the stories of four Chinese women teachers as they engage in ongoing construction and negotiations of gendered identities over their life histories in Hong Kong. All are ethnically Chinese, of different ages and at different stages of their personal and professional lives, and all have grown up in Hong Kong. A framework of post-colonial concepts of hybridity and border crossing helps to suggest how identity resources develop in relation to a range of contemporary practices which are experienced as both pressures and opportunities. These Chinese women teachers' identities are seen to be complex, fluid and multi-faceted, continually under construction in their daily lives, with changes experienced in both work and family settings.     

Direction dependence of displacement time for two-fluid electroosmotic flow

Electroosmotic flow that involves one fluid displacing another fluid is commonly encountered in various microfludic applications and experiments, for example, current monitoring technique to determine zeta potential of microchannel. There is experimentally observed anomaly in such flow, namely, the displacement time is flow direction dependent, i.e., it depends if it is a high concentration fluid displacing a low concentration fluid, or vice versa. Thus, this investigation focuses on the displacement flow of two fluids with various concentration differences. The displacement time was determined experimentally with current monitoring method. It is concluded that the time required for a high concentration solution to displace a low concentration solution is smaller than the time required for a low concentration solution to displace a high concentration solution. The percentage displacement time difference increases with increasing concentration difference and independent of the length or width of the channel and the voltage applied. Hitherto, no theoretical analysis or numerical simulation has been conducted to explain this phenomenon. A numerical model based on finite element method was developed to explain the experimental observations. Simulations showed that the velocity profile and ion distribution deviate significantly from a single fluid electroosmotic flow. The distortion of ion distribution near the electrical double layer is responsible for the displacement time difference for the two different flow directions. The trends obtained from simulations agree with the experimental findings.     

Dimensionality of Modernity in Singapore Among Chinese Adolescents

The present study examined the relationships between aspects of individual modernity among Chinese adolescents in Singapore aged fifteen years (N = 250, M = 122, F = 128). The Aspects chosen are those seen by Inkeles (1969), changes that occur in a country's modernization as being required in order to cope with the various need for achievement, efficient time-management, future-planning and autonomous decision-making. While there is strong interdependence among achievement motivation, future-planning and time-management of both genders, autonomy emerges as a separate dimension.