Abstract
The purpose of this study was to develop a self – designed e - learning module to enhance the skills in adding and subtracting rational expressions of the grade 8 students of Bagong Silangan High School. The design of this study is a combination of experimental and descriptive research design. In determining the total sample of the expert respondents, the study employed the cluster sampling technique. The respondents of the study were 110 grade 8 students and 32 experts. The self–designed e–learning module in adding and subtracting of rational expressions in Mathematics 8 featured introduction, adding and subtracting similar rational expression, adding, and subtracting dissimilar rational expression and enrichment. Based on the assessment of the panel of experts, the modules were found out to be accurate, well formatted, well presented, organized, accurate and relevant. Meanwhile, based on the students’ assessment of the self – designed e – learning module in adding and subtracting of rational expressions in Mathematics 8, the modules are comprehensive, understandable, and suitable to their level. The performance of the students in adding and subtracting rational expressions in Grade 8 Mathematics in the control and experimental groups is significantly different based on comprehension, analyzing and evaluating areas.
