The construction of valid and reliable test demand a special knowledge. There are literature on the test construction.
When a teacher constructs a test, it is said to be a teacher made test that is poorly prepared. Then when an expert
constructs a valid and reliable test, it is called a standardized test. Be it as it may, a teacher can construct a test if well
guided. The problem of teachers for constructing poor test is a major issue in education that requires special attention.
However, teachers should consult an expert before using a test (Osadebe, 2012). It is even advisable for experts to
produce tests for teachers to use. Thus, non-standardized and standardized tests could be produced by experts. The
construction and standardization of test are special areas for those who have the background (Nunnally, 1981;
Osadebe, 2001).