iarjelIARJELIARJEL2708-5120https://doi.org/10.47310/iajel.2021.v02i01.023Construction and Standardization OF Mathematics Achievement Test for Senior Secondary 1 Students.EzeugoNnekaChinyereMetuIfeomaClementinaIkwelleAnthoniaChikaDepartment of Educational Foundations, Nnamdi Azikiwe University, Awka, Anambra State, NigeriaDepartment of Early Childhood Care and Education, Nwafor Orizu College Of Education Nsugbe Anambra State, NigeriaThis study focused on the construction and standardization of Mathematics achievement test for Senior Secondary1 Students (SS1). A total of 80 item objective test items were initially generated from SS1 mathematics curriculum using a table of specification. The items were validated and passed through a process of item analysis by administering to a sample of 300 SS1 students. Forty items emanated from the item analysis and were further administered to 1000 SS1 students in Onitsha Educational Zone of Anambra State within a time interval of 1 hour. A mean score of approximately 22 was calculated and that became the norm for the 40 item objective test items. The study equally revealed that there was a statistically significant mildly positive relationship between the difficulty index and the discrimination index.