The purpose of this study was to examine whether components of the Planning, Attention, Simultaneous, and Successive (PASS) processing theory of intelligence predict reading and mathematics proficiency in a group of intellectually gifted children. One hundred forty-two intellectually gifted children (70 females, 72 males; M[subscript age] = 127.41 months, SD = 10.76) were assessed on PASS processes as well as on reading and mathematics. Results of regression analyses showed that planning was a significant predictor of both reading and mathematics. In addition, simultaneous processing predicted mathematics and successive processing predicted reading. These findings suggest that when intelligence is operationalized on the basis of neurocognitive processes it can explain individual differences in academic achievement even among a restricted range of high ability students.