In their work, Chandler and Brosnan (1995) investigated the correspondence existing
between the frequently used Mathematics textbooks series in sixteen school districts of Ohio
with the Ohio 9thProficiency Test. They compared percentages of Mathematics textbook
content with percentages of Mathematics content on the test. They found out that the content
in the Mathematics textbook was disproportionate to the content of the proficiency test. They
identified areas of concepts with disproportionate. Chandler Brosnan (1995) then
recommended in line with National Council of Teachers of Mathematics (NCTM) Standard
that: curriculum and assessment content should be aligned; the goals, objectives and
instructional approaches should be aligned with the assessment task.