Students who can compute mathematical problems in their heads have learned a skill that is important for estimating and for understanding the number system. Practice activities that can help students master mental computation skills are described. (PP)

A range of estimation techniques are described, and a series of mental computation procedures based on concepts of measurement and real numbers are presented in detail. (MP)

Presents a modified version of the Wheel of Fortune game for mathematics classrooms that engages students in solving equations by using formal and informal methods. Encourages mental computation and estimation. (ASK)

In this brief guide, the use of microcomputer spreadsheet programs is discussed. Key characteristics are described, with examples of what these programs can do: calculations, recalculation, table lookup, data storage, logical decisions, and simple graphics. Advanced spreadsheet features are noted--consolidation, sort, and execute. Finally,…

Derivation of formulas and example problems for determining the size of a plane angle are given to help in drafting work. The authors state that a small hand calculator will provide greater accuracy in solving these problems than a protractor. (MF)

Argues the schools need to prepare students with trained minds and a proclivity for creative efforts to be successful in the technology-oriented society of the 21st century. Suggests the current educational policies will not accomplish those objectives. (PKP)

Tabulation of addition and multiplication fact frequencies in arithmetic texts for grades one through six showed that large facts, with operands larger than five, occurred only half as frequently as those with operands in the two-to-five range. Theoretical and practical implications are discussed. (MKR)

Presents a learning aid devised to teach undergraduate accounting students how to calculate earnings per share. (SK)

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)

In the signal detection paradigm, the non-parametric index of sensitivity A', as first introduced by Pollack and Norman (1964), is a popular alternative to the more traditional d' measure of sensitivity. Smith (1995) clarified a confusion about the interpretation of A' in relation to the area beneath proper receiver operating characteristic (ROC)…

A number of authors have proposed that determining an adequate sample size in structural equation modeling can be aided by considering the number of parameters to be estimated. While this advice seems plausible, little empirical support appears to exist. A previous study by Jackson (2001), failed to find support for this hypothesis, however, there…

Three experiments investigated the roles of resource-sharing and intrinsic memory demands in complex working memory span performance in 7- and 9-year-olds. In Experiment 1, the processing complexity of arithmetic operations was varied under conditions in which processing times were equivalent. Memory span did not differ as a function of processing…

Two experiments are described that investigate the ability to infer the number of items in one-to-one corresponding sets for two age groups. We assess the influence of set size, the visibility of sets, and the way in which set equivalence is derived - pairing versus sharing - using a repeated-measures design. Three-year-olds are largely restricted…

The aim of this study was to validate and standardize an instrument for the diagnosis of developmental dyscalculia (mathematics disorder) in a Greek population and to obtain relevant epidemiological data. We used the "Neuropsychological Test Battery for Number Processing and Calculation in Children" (NUCALC) in a community sample of 240 students…