A method is given for determining what months will have a Friday the thirteenth for any given year. (DT)

Annual records of the one-mile sun can be used to introduce a variety of statistical ideas including the scatter diagram, theoretical vs. observed values, and normal equations. (SD)

Worksheets contain instructions and patterns for use in constructing models of the platonic solids from cardboard and rubber bands. (SD)

Reviews research on block scheduling as related to the study of mathematics. Suggests issues for mathematics teachers to consider as they decide whether or how to improve such schedules. Discusses mathematics achievement under a block schedule. Contains 40 references. (ASK)

This study examined reciprocal relationships between attitude toward mathematics and mathematics achievement. High school seniors from the Dominican Republic completed mathematics achievement tests and a questionnaire on mathematics attitudes. Results indicated that reciprocal relationships existed, suggesting that the reciprocal nature between…

Presents two methods for replacing a series by one converging more rapidly: regrouping the terms of a series and manipulations of power series. Describes a general algorithm for approximating the natural logarithm of any number. (YP)

A familiar procedure for generating magic squares is reviewed. A surprising pattern is noted. (MNS)

Introduces a statistics curriculum emphasizing an instructional sequence of practical, real data, discussion, and model/theory instead of theory, example, and practice. Provides one example and describes the teaching methods of the curriculum. (YP)

This article provides a chronological table on the history of geometry. The table describes the name and performance of mathematicians from the Babylonians to 1977. Nineteen references are listed. (YP)

Discusses openness involving assessment, including sharing information, involving professionals, examining and revising criteria, benefits of openness, and sharing responsibility for good mathematics work. (MKR)

Discusses the integration of assessment into instruction using a four-step framework: planning the activity, gathering evidence, interpreting evidence, and using evidence. (MKR)

Discusses the differences between mathematical constructions and drawing, offers tips for emphasizing construction, and discusses appropriate constraints of constructions. (MKR)

Shows similarities between realism and radical constructivism by presenting examples of using children's ideas in order to create education in the context of teaching spherical geometry. (18 references) (MKR)

Describes the teacher, classroom, and curriculum of the Consortium Calculus based at the Harvard Project, which offers students, especially women, an opportunity to explore the power of calculus in an encouraging environment. (18 references) (MKR)

Presented is a description of how the NCTM Standard, "Mathematics as Communication," can be addressed using a learn-to-write strategy. Responses are suggested to the questions of why writing about mathematics can improve learning and how this approach can be implemented in the classroom. (MDH)