Development of grubi mathematics module to improve the ability to calculate the addition and subtraction of small numbers in grade 2 elementary students

Abstract

The study aims to know the feasibility, effectiveness, and response of the grubi math module to increase the ability to calculate numbers and decrease numbers in second-grade students. Research and development (R&D) using the ADDIE model. The research subject consists of validator experts in materials and media, 24 students in the 2nd grade. Data collection instruments include expert validation sheets, pretest-posttest are essay questions, and student responses. Research obtained (1) the worthiness assessment of the module from materials expert 92.5% and media expert 96.7% with both "very good" criteria, (2) the effectiveness of modules with one group pretest-posttest design to achieve a lower average pretest value (91.38) means that learning students experience an increase, (3) the module gains responses from students with percentage of 89.30% with the "very good" criteria. Through these data it is shown that the grubi math module is worthy of being used as a teaching material in the elementary school on the basis of valiance and from experts, the effectiveness and response of students in the development of the grubi math module to increase the ability to calculate numbers and deformity. As for second-grade teachers who perform math studies on similar materials to use the grubi math module.