The purpose of the present study was to determine the psychometric properties and the norms of the Advanced Raven\'s Progressive Matrices Test (APM) administered to the eleventh and twelfth grade students in Sultanate of Oman. The sample consisted of 2467 students (1199 males, and 1268 females) selected from six regions of the Sultanate. It was found that the APM is adequately internally consistent (reliability coefficient was 0.87). This coefficient did not vary with gender or grade. A wide range of difficulty level of the items was observed. This result is consistent with the results of many previous studies. The average item difficulty index was 0.38 while the average discrimination index was 0.346. The raw scores ranged from 1 to 34 (out of 36). These results indicate the ability of the APM to discriminate between individuals in their higher level general intelligence which is the mean objective of this test. Therefore, the APM is useful in identifying gifted individuals. The difference between the two grades in average performance was significant. This result shows that performance in the test increases with age which is an indication of construct validity. The LISREL program was used to ascertain the factorial structure of the APM. Confirmatory factor analysis indicates that the APM is unidimensional. This result is consistent with the nature of the test which is assumed to measure the \"g\" factor of intelligence. Norms for the 11th and 12th grades were calculated, and percentile ranks corresponding to each raw score were presented. Hence, the APM is now available for use in these grades in the Sultanate.