This study focused on determining the effect of the use of Gen-Math Machines which are manipulatives or teaching tools in one of the core subjects of Senior High School, General Mathematics. The teacher-researcher asked the learners to develop Gen-Math Machines that would elicit the things that they are learning in General Mathematics, and those machines were used in enhancing skills of learners in General Mathematics. One hundred forty-four became the respondents for this study, and they were the grade 11 learners of Talangan Integrated National High School, school year 2017-2018. Data came from the result of a 20-item quiz given after teaching sessions on the topic Exponential and Logarithmic Function ? one set of data using teaching process without the aid of Gen-Math Machines while the other set of data came from teaching process with the aid of Gen-Math Machines. For teaching process without the aid of Gen-Math Machine, the learners got a mean of 9.94 and an SD of 4.38 from a 20-item short response quiz. On the other hand, learners got a mean of 14.65 and an SD of 8.87. Learner to a higher mean when manipulatives are used during the teaching-learning process. Using t-test for independent samples, it was found out that teaching process has significant effect to the Mathematical performance of learners. The Gen-Math improved learners? concept and skill in mathematics. Recommendations to mathematics teachers, department head, school heads, family, community and future researchers were left at the end of the study.

manipulatives

performance

Mathematics