Despite the importance of computational estimation skill for the improvement of number sense, little research exists on preservice teachers' estimation skills and their view on estimation in the US context. This study examined the computational estimation skill of 58 preservice elementary teachers (PSTs) and its relationship to their views of the…

Discusses the efforts of one Japanese company that makes abaci to demonstrate that the abacus continues to be a feasible alternative as a calculator in the elementary school mathematics curriculum. Argues that the abacus improves number sense, mental computation, and mathematics achievement for students who use the abacus. (MDH)

Studied for three years were eight Swedish classes with pupils aged 10-12 using calculators whenever they could be of use, along with experimental textbooks. The experimental classes were as competent as control classes in mental arithmetic and calculations with simple algorithms, and had better understanding of numbers and problem solving. (MNS)

Examines the use of mental, written, and calculator strategies of numerical computation by 56 upper primary students. Finds that students introduced to a "calculator-aware" curriculum make greater use of mental computation, particularly multiplication strategies based on distribution and compensation. Notes implications for models of…

How children perceive doubling and halving numbers is discussed, with many examples. The use of calculators is integrated. The tendency to avoid division if other ways of solving a problem can be found was noted. (MNS)

In order to stimulate further discussion, this article addresses issues concerning calculator use in elementary school mathematics such as: Is computation still important in elementary school? How would a calculator-driven curriculum look? When is calculator use appropriate? and How should calculators be used? (Author/MKR)

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)

The author suggests that the efficient use of mathematics in everyday life means translating situations into mathematical contexts, using a calculator and mental methods of calculation. Suggestions for teaching these concepts are included. (PK)

Debates the place of standard methods, the calculator, and mental mathematics in elementary education. Proposes a framework for computation that emphasizes a sequence for introducing computational procedures. (ASK)

Describes the method to solve problems called T-E-M-T-T: trial, error, and modified trial through technology. The method integrates students' skills of estimation, mental computation, and appropriate choice of calculator use. Includes 2 activities for each of grades K-4 and 5-8 that illustrate the method. (MDH)

This first in a series on the programable calculator presents a chapter on the basic operations. The series is written for a particular calculator, Hewlett-Packard's HP-25. (MP)

Two games and one activity designed to be used with a hand-held calculator are presented. (MK)

Found that, after extracting an arithmetic problem from a real situation and working out an answer, 6- to 12-year-olds with learning difficulties in math were unable to reapply the answer to the situation. Also found that the children, in a hypothetical situation, were unable to use token money, or to do calculations on paper or with an electronic…

The role of common fractions in mathematics education and in applications is discussed in light of the increased importance of calculators and the metric system. (MP)

The use of the calculator is suggested in teaching algorithms for the four basic operations, in place of any difficult standard algorithm. (MP)