A 20-question quiz on the uses of numbers in the real world is presented. (MK)

Arguments given against switching to the metric system include: the metric system is foreign; only scientists need the metric system; and who needs systems of measurement, anyway? (MP)

A systematic search is given for products where reversing the digits does not change the answer. Related questions are suggested that can be solved by the same discovery approach. (MP)

The use of a multiple approach using both geometric and algebraic contexts is suggested in teaching concepts. Several examples are given including area and multiplication, length and number, and functions and power. (MP)

Difficulties encountered by a dyscalculia child are discussed and remedial activities suggested. Disturbances discussed are verbal, visual-spatial, reading and writing numbers, operations, understanding concepts, and place value. (MP)

Two inquiry-oriented lessons that involve students in numerous computations, but are also enjoyable mathematics activities, are described. Drill activities are camouflaged by the challenge of a game. (MP)

A series of lessons concerning money and place value is described and instructional techniques are analyzed. (DT)

Ways in which elementary children can learn the concept of "zero" are described. (DT)

Sidelights and extensions of factorability are presented. (DT)

Describes a problem suitable for grades 1-6 where students utilize a hundreds chart and counters. Students cover any numbers that contain only the digit 1, then cover any numbers containing only the digits 1 and 2, and follow this pattern until they can determine how many digits are needed before the hundreds chart is half covered. (AIM)

Analyzed construction of approximative expressions with two numerals in Dutch. Found that choice of number words was not arbitrary and that various kinds of factors are involved. Results suggest that analogue magnitude code is used in estimating and comparing, and human cognition seems to be able to perform simple calculations with quantities,…

Describes how one kindergarten classroom made pictographs and paper graphs of the students' acting preferences for a production of "The Wizard of Oz." Focuses on how the activity led to varied mathematics and literacy connections. Identifies implications from the Oz experience, including relating graphs to classroom contexts, using…

Presents a recounting of the work of Kepler and Wiles, great minds who made a tangible impact on the field of mathematics but who had to overcome seemingly insurmountable roadblocks. (KHR)

Enumeration and numerical reasoning levels of 19 children with specific language impairment (SLI) were compared to children matched for age and children matched for grammatical ability (GM). Children with SLI performed better than the GM group on reproduction of sets, numerosity of sets, an addition/subtraction condition, and transformation…

Introduces RSA, one of the most popular public-key cryptosystems that is used to protect the privacy of computer users. Describes the mathematical foundation of public key cryptography. (KHR)