This document discusses regional planning and development. It defines regional planning as spatial planning undertaken to achieve national development goals by evaluating sub-national areas' potential and developing them for the national benefit. Regional planning aims to promote economic growth, income/employment, improved organization/administration, social development, settlement patterns, and environmental objectives. It involves delineating regions based on criteria, defining objectives, formulating and implementing plans within national frameworks, and monitoring/reviewing. Theories discussed include growth pole theory and core-periphery concepts, which analyze how development spreads from economic centers to peripheries.