Achievement test is a mechanism to measure student's knowledge and abilities. Numerous categories of achievement tests have been developed by different scholars and psychologists. Since they do not directly consider curriculum adopted during the course of study of students, they do not reflect truly upon the achievements of students. We propose an achievement test which is computerized and is based on assessment of RAW (reading, arithmetic and writing) capabilities considering curriculum used for imparting education. We set compositions and contents according to age group and educational standards. We then conduct a series of experiments to show how an achievement test linked with a curriculum is reflective, in a better manner, of the student's achievement index then a general one. We call Online RAW Achievement Battery test and we also develop an application which use for conducting our experiment and formulation of results. Finally, we analyze our results with students' historical records and WRAT-4 which is a well-known standardized test and report our findings.