Improving Students' Mathematical Computational Thinking Using Scratch Program through Project Based Learning: A Development Research during Pandemic Covid-19

This study aims to examine the development of Project Based Learning kits using Scratch program to improve students' mathematical computational thinking skills in statistics content. The research method used is Research and Development (R & D) approach which refers to Four-D model: Define, Design, Develop, and Disseminate. In the initial stage, researchers conducted preliminary research through literature studies, school surveys, and draft designs. The study produces Project Based Learning kits using Scratch program consist of student's worksheet, lesson plans, and an instrument of mathematical computational thinking. The design of the model was then revised by the expert trial subject. The subjects of the expert test were mathematics learning experts and several mathematics school teachers. The field Pre-Test and Post-Test were conducted in a Junior High School in Tangerang Selatan on mathematical computational thinking instruments, consisting of four essay test (8 question items). The collected data were analyzed using qualitative and quantitative techniques. In validity aspects, all the three learning kits are valid. From the aspect of effectiveness, the Project Based Learning model intervention can improve students' mathematical computational thinking skills. In terms of practicality, students' responses to the developed worksheets are positive.