Background/purpose: In modern mathematical education, it is important to develop students' ability to understand the fundamental properties of geometric objects deeply. This makes it relevant to study the additivity of the area of triangles as a property inherent in various kinds of quantities and ways of representing it methodologically in the…

Computational algorithms appearing in early American arithmetic text are discussed. (SD)

Chapters 5 through 10 of a 14-chapter, three-volume work on arithmetical applications are contained in this document. Each chapter details the "use classes" of one broad arithmetical concept. (A "use class" of a concept is a set of examples of real world uses of the concept which share a common structure). Each chapter…

Design and results of an investigation attempting to analyze and improve children's solution processes in elementary addition and subtraction problems are described. As background for the study, a conceptual model was developed based on previous research. One dimension of the model relates to the characteristics of the tasks (numerical versus word…

This handbook is intended to provide mathematics curriculum leaders and supervisors with discussion and related activities central to a presentation of algebra for teachers of students with a history of lower academic achievement and who are part of our underserved populations. The handbook: (1) deals with general algebra activities; (2) focuses…