Many countries do not yet have sufficient experience in the
elaboration of textbooks and their generalized use at all levels of schooling.
In such cases, a trial edition can avert serious drawbacks and waste of
resources which would result from the mass production of school books which
contain shortcomings which could be prejudicial to the quality of teaching. Such
cases can occur in a country where there are no competent authors, or no
teachers with sufficient experience in writing textbooks. For these reasons a
trial edition should be tested, the main objective being to evaluate the
effectiveness of the final, revised textbook in the teaching-learning process
within a real school situation.
A trial edition can be produced with relatively limited
resources, using, for instance, mimeographed reproduction or printing on small
off-set presses. Illustrations playing an important role in the text should be
reproduced, unless reproduction involves complicated techniques (such as the use
of several colours). Reproduction in black and white can often suffice.
Copies may be limited to a few