Checklist items are suggested to help teachers diagnose strengths and weaknesses of students who have difficulty learning mathematics. Tasks involve the use of manipulative aids to determine such concepts as grouping, counting, quantity, and estimating. (CL)

The author presents a new method of teaching typing students how to type numbers. This keyboard presentation places equal emphasis on numbers and letters. This conveys to students the idea that numbers are not a special part of the keyboard. (CT)

A multiple habituation paradigm was used to determine whether 10- to 12-month-old infants were able to discriminate between visual arrays differing only in their numerosity. (Author/RH)

It is argued that Macnamara's criticisms of Piaget's theory of number do not lead to Macnamara's conclusions about arithmetic instruction. These conclusions appear to be based on misconceptions about logic and logical theories of number. The misconceptions are discussed and an empirical rationale for the conclusions about arithmetic instruction is…

A reply by Macnamara to Brainerd's criticism of the Macnamara (1975) article analyzing Piaget's theory of number. (JMB)

Discusses flaws in the reasoning behind a "new system" proposed for rounding numbers that was published in a previous issue of this journal. Concludes that the new system should be used only for numbers in which the nonzero digits following a dropped 5 have some significance. (JRH)

Discusses number patterns and Fibonacci numbers found in nature. (YDS)

Offers several tips on reading research, focusing on understanding the differences between the use of numbers and percentages. Provides specific examples. (PKP)

Discusses the care required in constructing written explanations of numerical data. (SR)

Studied the calculating ability used by a low IQ savant to identify prime numbers in two experiments comparing him to control subjects, one involving reaction time and the other involving inspection time. Concludes that this individual uses a complex computational algorithm to identify primes and discusses the apparent contradiction of his low IQ.…

Mathematics is a uniquely human capacity. Studies of animals and human infants reveal, however, that this capacity builds on language-independent mechanisms for quantifying small numbers ([less than] 4) precisely and large numbers approximately. It is unclear whether animals and human infants can spontaneously tap mechanisms for quantifying large…