Despite numerous recommendations, little has been done to integrate calculator use into elementary school classrooms. Cost, equal access, and the existence of computers are not obstacles to calculator use: our attitudes and beliefs are. What must be done to integrate calculators into the curriculum is outlined. (MNS)

An experimental program using the calculator in third, fourth, and fifth grades is described. Three example lessons are included, on (1) subtraction with regrouping, (2) estimation, and (3) number theory: Quadratics. (MK)

The design, selection, and organization of instructional materials that integrate calculators are described in relation to a model based on movement and representational level. Instructional resources and advantages of the model are described. (MNS)

A proposal to shift to a conceptually oriented curriculum using the calculator as an instructional tool and to eliminate the teaching of complex computations in elementary school is presented. (MP)

What students need to know in a world where most computations are done by machine is discussed. Needed changes in the mathematics curriculum are then detailed in relation to mental arithmetic, numeration, decimals and fractions, paper-and-pencil computation, order of operations, problem solving, and instruction on calculator use. (MNS)