A multimedia‐enhanced problem‐based learning experience in the Malaysian classroom

In this paper a multimedia project was incorporated into a problem‐based learning environment to examine how learning in multimedia could be enhanced through the use of problem‐based learning. Students in a second year course in the Faculty of Creative Multimedia (FCM) were assigned the problem‐based multimedia project, they worked in groups, solving the problem using the multimedia authoring process (MAP). This paper reports on the structuring of the student learning process, the impact of the problem‐based learning environment on student learning and the important skills such as creative and critical thinking, teamwork, communication, collaborative and problem‐solving skills that arose as the result of this intervention. In the process, a multimedia‐enhanced problem‐based learning (M‐PBL) model was created. The interrelationships between the teacher, students and technology in this learning mode were also established. A survey was conducted to assess the reactions and attitudes of the students towards this learning environment. The results obtained were positive and satisfactory.     

A meta‐analysis of national research: Effects of teaching strategies on student achievement in science in the United States

This project consisted of a meta‐analysis of U.S. research published from 1980 to 2004 on the effect of specific science teaching strategies on student achievement. The six phases of the project included study acquisition, study coding, determination of intercoder objectivity, establishing criteria for inclusion of studies, computation of effect sizes for statistical analysis, and conducting the analyses. Studies were required to have been carried out in the United States, been experimental or quasi‐experimental, and must have included effect size or the statistics necessary to calculate effect size. Sixty‐one studies met the criteria for inclusion in the meta‐analysis. The following eight categories of teaching strategies were revealed during analysis of the studies (effect sizes in parentheses): Questioning Strategies (0.74); Manipulation Strategies (0.57); Enhanced Material Strategies (0.29); Assessment Strategies (0.51); Inquiry Strategies (0.65); Enhanced Context Strategies (1.48); Instructional Technology (IT) Strategies (0.48); and Collaborative Learning Strategies (0.95). All these effect sizes were judged to be significant. Regression analysis revealed that internal validity was influenced by Publication Type, Type of Study, and Test Type. External validity was not influenced by Publication Year, Grade Level, Test Content, or Treatment Categories. The major implication of this research is that we have generated empirical evidence supporting the effectiveness of alternative teaching strategies in science. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 1436–1460, 2007     

Discovering patterns of achievement in Hong Kong students: An application of the Rasch measurement model

Researchers have warned of the need to identify accurately students who are underachieving in Hong Kong, particularly among the gifted group. When comparing the relative effectiveness of three methods for estimating the proportion of underachievement, the absolute split method, using an arbitrary upper and lower limits for estimates of both performance and ability, is more useful for identifying gifted underachievers than the simple difference method (where standardized performance scores are subtracted from standardized ability scores) or the regression method. In contrast, the latter two methods are more useful for identifying underachievers at all levels of ability. All three methods, however, depend on measurements that are invariant, unidimensional and additive. With the advent of modern measurement theory using Rasch measurement models, it is now possible to satisfy these requirements. In this study, a sample of Primary 5 students in Hong Kong (n = 957) were asked to complete a test of mathematical achievement and the Ravens Progressive Matrices test in order to estimate the proportion of students who are underachieving at all levels of ability. Measurement scales were created using Rasch models for partial credit and dichotomous responses for each variable, respectively, and students placed on each scale according to their responses. Because the results are based on measurement scales that are invariant between persons, the identification of underachievement in these students across all levels of ability can be regarded as objective rather than sample dependent.     

万有引力常数G的精确测量

采用长周期、高Q值的扭秤,并选择恒温、隔振、电磁屏蔽以及外界引力干扰小的实验环境,从而有效克服传统扭秤实验中扭丝的滞弹性和热弹性等影响,采用扭秤周期法在 1 0 5× 1 0 - 6相对精度上测量万有引力常数G。为了进一步提高G的测量精度,还系统研究了精密扭秤实验的各种系统误差及其对G的影响     

Do reading practices make a difference? Evidence from PIRLS data for Hong Kong and Taiwan primary school Grade 4 students

This study examined the influence of classroom pedagogic reading practices and out-of-school practices in explaining why the reading attainment of Hong Kong Grade 4 students was superior to that of their counterparts in Taiwan in the 2006 Progress in International Reading Literacy Study. Analyses of scores from 9301 students (4712 from Hong Kong and 4589 from Taiwan) revealed that independent reading in school made a distinctive contribution to the reading performance of Hong Kong and Taiwan students after controlling for the effects of students’ and parents’ reading attitudes, the availability of supportive home educational resources and student engagement in a range of reading practices. Out-of-school informational reading was found to be negatively associated with students’ reading attainment for both Hong Kong and Taiwan students. There was evidence that reading aloud in class in Taiwan classrooms significantly contributed to the Taiwan students’ poor reading performance.