Geometry has, in many countries, proved to be one of the problematic topics in mathematics. The purpose of this paper is to report on a study that was carried to…
Geometry has, in many countries, proved to be one of the problematic topics in mathematics. The purpose of this paper is to report on a study that was carried to investigate the effects of lesson study incorporating phase-based instruction (LS-PBI) using Geometer's Sketchpad (GSP) on Thai students’ geometric thinking.
The effectiveness of the LS-PBI using GSP within the targeted context was assessed in a quasi-experimental research approach involving three groups of mixed ability grade 7 students (12-year-olds) in one of the schools in Yala province, Thailand. These groups (Group 1: n=30, Group 2: n=28 and Group 3: n=29) were taught the topic of properties of 2D and 3D geometric shapes through phase-based instruction using GSP in turn by three different teachers. The teachers observed the lesson study teaching protocol. Data were collected using pre-test and post-test to assess students’ van Hiele level of geometric thinking. In addition, six students were selected to be observed in order to give supplementary data on their level of geometric thinking changed.
Findings revealed that the LS-PBI was effective in improving students’ geometric thinking. Analysis of paired sample t-test showed that there was a significant difference in the pre-test and post-test scores in each group after each LS session. Analysis of covariance showed that there was a significant difference in the post-test scores among the three groups of students.
The findings of this original study suggest that the LS-PBI using GSP was effective in enhancing students’ geometric thinking.
The purpose of this study is to propose a model to evaluate the performance of organizational units considering intellectual capital (IC) and employee loyalty approach…
The purpose of this study is to propose a model to evaluate the performance of organizational units considering intellectual capital (IC) and employee loyalty approach applying principal component analysis and data envelopment analysis (PCA-DEA) method.
Organization units are considered as decision-making units, IC components including human capital (HC), structural capital (SC) and customer capital are inputs and employee loyalty is output. The principal component analysis was used to converts inputs and outputs into the independent variables. As a return to scale is variable, a modified envelopment input-oriented BCC model applied to obtain the efficiency of organization units. Also, all units of organization are ranked. Eventually, sensitivity analysis performed to show how input variables influence on output variable.
Operation, design and construction, production planning, internal affairs, quality control and security were recognized as efficient units. Also, units of operation, internal affairs and quality control ranked first to third, and the human resource unit earned the last rank. In addition, results of sensitivity analysis on input variables showed that the order of impact intensity is: customer capital, HC and SC, respectively.
Existence a framework for the development of human resource strategies and prioritization in the allocation of organizational resources to improve the performance of the organization considering human resources is vital. Most of the previous studies, just have examined the impact of IC on different dimensions of organizational performance. Meanwhile, evaluating the performance of IC with employee loyalty approach, using PCA-DEA simultaneously can evaluate and measure the impact of IC on the performance of the organization and its units regarding employee loyalty, which has a significant impact on improving the organization’s level of IC and human resource management.