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)

An extensive investigation of pupil understanding of fractions at the secondary education level showed the majority tended to avoid using fractions, could not generalize about them, and probably did not see them as an extension of the set of whole numbers. (MP)

Problems are presented that can be solved with a microcomputer which explore the binary, decimal, and hexadecimal number systems and related problems. (Author/TG)

This calculator experiment for seventh-grade students on prime factorization contains objectives, difficulties, a discussion, several examples, and a worksheet. (MP)

Instructional problems springing from teachers' incorrect use of mathematical models during the initial development of ideas and processes are analyzed. Examples of models for subtraction and division are given, and their appropriate use discussed. (DT)

Presents a lesson that teaches number patterns through the Vedic matrix found in Vedic mathematics from India. (KHR)

A square-dance number is defined as an even number which has the property that the set which consisted of the numbers one through the even number can be partitioned into pairs so that the sum of each pair is a square. Theorems for identifying square-dance numbers are discussed. (YP)

Shows numeral systems using base-10 positional systems currently in use in other countries. Describes two of the systems, Arab and Nepalese, and one, Chinese, that operates on a different principle. Provides references for getting more information about diverse numeral systems. (YP)

The content of the standards focusing on numbers and numeration for grades K-8 are discussed. Several activities for developing number concepts and skills are described. (YP)

Describes a number line created by fourth-grade students containing paper rectangles to represent the basic multiplication facts. The use of this number line can help students to understand factoring, prime and composite numbers, and beginning fraction concepts. (MKR)