This issue brings together scholarly contributions examining mathematical learning through the interconnected perspectives of cognition, reasoning, representation, and instruction. The articles address diverse aspects of mathematics education and provide theoretically informed and empirically grounded insights into how learners develop mathematical understanding.

The contributions reflect a commitment to rigorous, relevant, and meaningful research that connects mathematical cognition with instructional practice. Together, they offer perspectives that may inform mathematics education research, teaching, learning, and the design of more responsive instructional environments.