The Effects of the use of Microsoft Math Tool (Graphical Calculator) instruction on students’ performance in linear functions Philip Siaw Kissi1*, Opoku Gyabaah2 and Sampson Kwadwo Boateng3 1. Management Information System Department, Cyprus Internatio

The aim of the study was to investigate the effect of Microsoft Math Tool (graphical calculator) on students’ achievement in the linear function.  The study employed Quasi-experimental research design (Pre-test Post-test two group designs). A total of ninety-eight (98) students were selected for the study from two different Senior High Schools (SHS) in Accra, Ghana. The two schools were categorized as control group of forty-eight (48) students and experimental group of fifty (50) students. The analysis of data was done using independent t-test with alpha value (α) = 0.05. Pre-test assessment conducted at the beginning of the study shown no significant difference, t (95.720) = -0.441, p = 0.660 between the control and experimental groups. This indicated that the two groups were homogeneous. The experimental group received teaching instruction using the graphical calculator while traditional lecture method was used to teach the control group by the same instructor. Results revealed that there was significant differences, t (96.000) = -6.984, p = 0.00 in students’ performance between control and experimental. This suggested that mathematics teachers and curriculum or textbook developers should introduce the use of the graphical calculator to improve students’ performance in mathematics education, particularly linear and quadratic functions. Keywords: Linear function, graphical calculator, technology, theory, mathematics

Effect of Problem-Based Learning on Students’ Achievement in Chemistry

The study investigated the effect of problem-based learning on students’ achievement in chemistry.   Learners’ low achievement in Science in South Africa has been a concern to government, stakeholders, school principals and parents over the years as a result of poor teaching techniques, students’ attitudes, lack of teaching and learning materials, teachers’ pedagogical skills etc. Several studies, for instance Monitoring Learner Achievement (MLA) project conducted by UNESCO and UNICEF have shown no improvement in the performance of South African students in Mathematics and Science. Quasi-experimental design was employed for the study. 101 equivalent students were selected for the study using pre-test. The control group was taught with the traditional lecture method whiles the experimental group received instruction with PBL. Independent T-test was used for the analysis. Results showed that there was significant difference (p < 0.05) in chemistry achievement of students between control and the experimental group while there was no significant differences in the before the study. The results show that PBL is an effective way for to teach chemistry so as to improve students’ critical thinking and problem solving skills. Keywords: Chemistry, Problem-Based Learning, Critical thinking, Traditional lecture, Achievement