Motor development is the most important aspect of growth and development. Motor development depends on the interaction of experience with an individual’s physical, cognitive, psychosocial status and proceeds in a predictable fashion across developmental periods. The differences in motor performances as motor outcomes are indicative of physical fitness. The researcher intended to assess the variation in motor performance among school boys studying in different regions of Karnataka. The researcher selected 6 districts included in the present study. 200 boys from each age group are been selected. Hence total 1200 School boys were selected for the present study by convenient sampling technique. The researcher intended to assess the five variables such as Flexibility, Endurance, Agility, Speed, Explosive strength. Tool used in the present study include Measuring tape, stop watch, high jump stand & cones.