ABSTRACT
The teaching of arithmetic to sub-normal children will be successful if the teacher is aware not only of the general limitations of the mentally handicapped in this activity, but also of the particular problems that face each member of the class. Traditional class teaching of the chalk and talk variety, although it has its place with older children, does not always allow for the individual abilities and disabilities of the sub-normal since it tends to anticipate general progress from a common fund of experience. The type of organization chosen for number activities naturally depends upon the facilities available, the composition of the class, and the educational philosophy of the Head and staff of the school, but broadly speaking it may be said that it should be flexible enough to allow for the individual development of each child within the social framework of the group.
