Development of learning devices: brain-based learning and mathematics critical thinking

The low percentage of logarithms lesson only 22.36%[1]. The solution to overcoming the problems experienced by these students is through a brain-based learning approach that can help students to understand, think critically in solving logarithms problems. Development research is carried out using a modified 4-D model consisting of define, design, and develop. The research instruments used were validation sheets, legibility validation sheets, and student response questionnaires. Data analysis was performed on each data obtained with research instruments. The conclusion obtained is that the brain-based learning cooperative learning device in the form of good student worksheets has been achieved because the validator team states that the learning tools developed are valid, and the implementation of the trial, the device meets specific requirements. 81.23% above the minimum criteria value and 76 % of students experience an increase in cost from the previous value. This shows that using worksheets students can improve students’ critical thinking skills.