Ratnawati, Wahyu, Sutama, and Sabar Narimo. “Development of Mathematics Teaching Materials to Improve Higher Order Thinking Skills in Grade 3rd Students in Elementary School”. JTP - Jurnal Teknologi Pendidikan 24, no. 2 (August 26, 2022): 236-245. Accessed May 4, 2024. https://journal.unj.ac.id/unj/index.php/jtp/article/view/28318.