The National Examination Council (NECO) conducted its maiden June/July SSCE in the year 2000 and had since continued to conduct Senior School Certificate Examination (SSCE) twice in a year (June/July and November/December) alongside with the West African Examinations Council (NECO, 2007).
Specifically, the study focused on: 1) item difficulty index of each of the NECO and WAEC SSCE multiple choice Biology tests; and 2) item discrimination power of each of the NECO and WAEC SSCE multiple choice Biology test.
The 2008 WAEC and NECO SSCE multiple choice Biology items have a total of 120 items including 540 options (420 decoys and 120 correct responses).
To determine the difficulty index of each of the NECO and WAEC SSCE multiple choice Biology tests
The researcher determined the item difficulty index of each NECO and WAEC SSCE multiple choice Biology tests by following the CTT principle of selecting the top and bottom 27% of the students for obtaining this item characteristic.
Further provides for the completion of additional work, such as execution of accesses, survey work of registration of manholes and cleaning and unclogging unsystematic, SSCE
networks and networks it serves.