Add

38 + 58 + 78 + 18
638
16 + 38

Subtract

10.00
3.49
4 yd. 1 ft. 6 in.
2 yd. 2 ft. 3 in.

Multiply

1¼ × 816
258
145
206
————

Divide

2 ) 13.50 25 ) 9750

The invention of means of teaching thirty so different children at once with the maximum help and minimum hindrance from their different capacities and acquisitions is one of the great opportunities for applied science.

Courtis, emphasizing the social demand for a certain moderate arithmetical attainment in the case of nearly all elementary school children of, say, grade 6, has urged that definite special means be taken to bring the deficient children up to certain standards, without causing undesirable 'overlearning' by the more gifted children. Certain experimental work to this end has been carried out by him and others, but probably much more must be done before an authoritative program for securing certain minimum standards for all or nearly all pupils can be arranged.