The study sought to investigate the effects of Polya’s Problem-Solving Model (PPSM) on learning achievement and analyzing ability in mathematics of fourth grade students. The sample of 32 students out of three sections was selected purposively as the subject of the study. Pretest and posttest one-group experimental design, achievement test and time series record were used to collect data. The collected data were analyzed using descriptive statistic and t-test. The t-test analysis revealed a statistical significant difference between the mean scores of in favor of posttest (M=13.78; SD=3.02) than the pretest (M=6.66; SD=2.44) at p=.00, indicating the improvement in the mathematical academic achievement using PPSM. Moreover, the time series record also showed that there was significant progression in the performances of the students after the inclusion of the PPSM. Thus, this study recommends the implementation of PPSM as an alternative method of instruction in teaching and learning of mathematical problem solving.

This study aims to find out the effectiveness of classes VII and VIII science towards enhancing the learning of class IX physics. The sample of the study consists of 130 students and 12 science teachers of three secondary schools. The collection of data were administered using survey questionnaires and focus group interviews. The quantitative data was analyzed using SPSS and the interview data was coded based on themes. The study revealed that the basic concepts of class IX physics is already introduced in classes VII and VIII science textbooks. However, students face difficulties in understanding class IX physics. The study suggest that when three separate sciences are combined into a single science textbook, some concepts were not covered in detail. Therefore, the study recommends Ministry of Education, Bhutan to work towards developing bifurcated science: Physics, Chemistry and Biology for classes VII and VIII.