The claim on high degree of relevance, suitability and adequacy (appropriateness) of
the textbooks by the teachers may not be acceptable in an absolute term. This is due to the
following reasons; the textbook to a knowledgeable teacher, is a teaching guide whereas to
the students, it is a learning guide. This implies that giving opportunity to the students to
make an assessment might tend to reduce the level of the books’ appropriateness. Also the
exposure of teachers to other textbooks written in pattern to programmed instructions which
is interactive in presentation, may make them reconsider a downward review of the
appropriateness of their textbooks. In addition to this, one ought to know that the strength of
the assessment depends on the strength of the curriculum which is the basis or yardstick of
comparison. The series of the mathematics textbooks are many. Each series has contributed
to the measure. If the modal textbook (NGM, table 1) is very appropriate, this may tend to affect many other textbook series involved in the analysis. This may subdue the true picture
of assessment of the textbooks, except if the analysis of each text series is separately
reported.