Some proposals on how children may learn the basic multiplication facts through practical activities based on the rectangle. (MM)

An investigation was conducted with 200 first-grade students to determine whether language is a major factor in conservation of number experiments. It was concluded that language was not a major factor. (RP)

Work with recurring decimals provides pupils with an opportunity for exploration and examination of a wide variety of mathematical ideas and strategies. Examples of work done by one group of pupils who were presented with an opportunity to explore such decimals is featured. (MP)

The teaching of numeral representations other than decimals is seen as a necessary and important step in the education of pupils in computing. Basic arithmetic procedures for binary, octal, and hexidecimal bases are discussed. (MP)

An appeal is made for a more formal treatment of the topics of estimation and reasonableness of answers in the school mathematics curriculum. (MP)

The article includes a short history of polygonal numbers, a method for finding the root of a polygonal number, and suggestions for using polygonal numbers in the classroom. (MK)

This constructivist teaching experiment investigated the role of whole-number knowledge in fraction learning. Two nine-year-old students worked for one year with a computer program (Copycat) and demonstrated that the development of whole-number knowledge and rational-number knowledge is interdependent. Contains 59 references. (KMC)

A study of 1,848 Chinese children from birth through 6 years of age found that the ability of Chinese children in counting, counting backward, repeating digits, repeating reversed digits, and comparable activities was stronger than was indicated by the Stanford-Binet Scale and other data. (CB)

Describes a number sequence made by counting the occurrence of each digit from 9 to 0, catenating this count with the digit, and joining these numeric strings to form a new term. Presents a computer-aided proof and an analytic proof of the sequence; compares these two methods of proof. (YP)

The 5-stage model of Ross was used to examine the role of instruction in facilitating children's acquisition of place value knowledge. Compares children from 2 samples on 10 tasks designed to reveal their thinking about place value. Discusses implications for theory and classroom. (YP)

This study illustrates the types of information microgenetic methods can yield. Ninety-seven 5-year olds who had not mastered number conservation were given training in conservation or in reasoning about conservation. Results elucidate how changes in thinking occur and demonstrate children's efforts to understand other people's reasoning. (SLD)

The teaching of negative numbers poses problems at the school level. A historical account of the intellectual difficulties in the evolution of negative numbers and a method of viewing negative numbers as an extension of the number system to help overcome these difficulties are presented. (MDH)

Explores relative developmental influences of age, number-sense, and context on primary school children's ability to estimate measures. Finds that, although number-sense improved with age, estimation did not; ability to perceive number relations influenced ability to estimate area; and estimation was more accurate in textbook exercises than in a…