The author argues that with the adoption of the metric system of measurement, common fractions became inappropriate to the school mathematics curriculum. (SD)

Development of the repeating decimal expansion for rational numbers is discussed. Expressions for numbers in other bases are also presented. (SD)

Three games involving prime numbers and exponentiation are described. (SD)

A method of finding large primes is described. High school students can use the test using hand calculators, or by programing a computer. (SD)

The author argues on theoretical grounds that not all "logical" pre-number activities are equally relevant for numeracy, and concludes with a practical suggestion for the kind of activity which does have particular relevance. (MN)

This study compares three methods of introducing two-digit numeration. It is concluded that teachers should build on the preschool exposure children have in counting past ten, rather than have children begin by counting out groups of tens and ones and only later in the process use the normal number names. (MN)

Teaching sequences designed to develop strategies for comparing numerals in grade two (in France) were analyzed. Children's strategies were noted, and an experiment confirmed underlying misconceptions concerning number. (MNS)

Defines and discusses number sense. Suggests a variety of activities appropriate for primary students that will help develop number sense. (PK)

A series of nine activities that illustrate prime factorization and other elementary number theory ideas in concrete, representative, and symbolic form are described. (MNS)

A form is presented for helping students calculate the greatest common factor and least common denominator of two numbers. (DT)

Four worksheets showing how number patterns may be used to give extra practice and insight into the decimal numeration system and the basic properties of arithmetic. (MM)