This course aims to help educators develop a strong foundation in rational number reasoning for K-5 students. Participants will learn strategies to support students in understanding and applying the concept of equipartitioning. The course covers various tools and skills such as problem-solving techniques, hands-on activities, and assessment strategies. The teaching method includes a combination of lectures, group discussions, and practical activities. This course is designed for educators, teachers, and instructional designers working with students in grades K-5.