The new, and prevalent, raised-dash notation (for subtraction) appearing in school mathematics texts is examined, especially for its effects on students' computational skills. Reasons for a return to the standard notation of the centered dash are presented. (Author/MN)

Describes the use of programmable calculators to perform classroom controlled experiments on economic models. The complete program for exploring the dynamics of the Harrod-Domar equation is given. Some difficulties encountered and statistical uses are mentioned. (BC)

The use of calculators in mathematics classes of eight-year-olds was investigated. Results showed that the experimental classes were quicker and more accurate in addition, subtraction, and multiplication than the control classes at the end of the year. (MN)

A method for approximating the nth root of any positive number that requires only a four-function calculator with a square-root key and repeat multiplication capability is given. (MN)

A brief account of the controversial arrival of the use of the electronic calculator in schools and examinations in Scotland is given along with suggestions for future calculator usage. (MN)

A restaurant menu is used to apply mathematics to real situations. A variety of mathematical problems, as well as applications to other content areas, is suggested. (JT)

A motivational game providing practice in computing and problem solving is described. (JT)

Computational science is defined as science done on a computer. A computer can serve as a laboratory for researchers who cannot experiment with their subjects, and as a calculator for those who otherwise might need centuries to solve some problems mathematically. The National Science Foundation's support of supercomputers is discussed. (MLW)

Explains the use of a convex lens as a thick mirror. Shows the expression for the power of this type mirror. (YP)

This study: (1) documented the spontaneous derived facts strategies (DGSs) that second-grade children (N=23) used; (2) investigated how training in use of DFSs influenced the solution strategies children used to solve addition and subtraction problems; and (3) examined the role of DFSs in the transition to recall of number facts. (JN)

Ideas are given on how to teach children to make estimates in measurement. (MNS)

Suggests activities which provide students with opportunities to give meanings to symbols and to find reasons for doing computations. Includes investigations with a pendulum, circular running track, salary increases, and container volume. Indicates that teachers should place less emphasis on drill and manipulation to give meaning to abstract…

Compares the Genevan and Cattell-Horn theories of intelligence and describes both similarities and differences. Describes a study investigating the relation of the Piagetian operative level to the child's ability to use crystallized solution procedures (aids) in making elementary numerical comparisons. (HOD)

After summing up the current status related to estimation and mental computation, what needs to be done to promote increased instruction on these topics is discussed. (MNS)

Specific instruction in different contexts provide needed background for solving addition and subtraction problems. The categories of problems and relative difficulties are presented, followed by an explanation of a successful instructional sequence. (MNS)