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Showing That a - b = -(b - a).

Peer reviewed

Bell, Garry – Mathematics Teacher, 1997

Presents an approach to explaining a relation, a - b = -(b - a), that is difficult for algebra students to understand. The approach came about as a result of discussions with students in which they provided many novel explanations. (DDR)

Descriptors: Algebra, Classroom Techniques, Educational Strategies, Foreign Countries

Procedures for, and Experiences in, Introducing Algebra in New South Wales.

Peer reviewed

Pegg, John; Redden, Edward – Mathematics Teacher, 1990

Discussed are the philosophy and procedures behind the introduction of algebra to students in grade 7 in Australia. Included are the importance of concrete experiences, language development, and the consequences involved in this procedure. (CW)

Descriptors: Algebra, Cognitive Development, Educational Improvement, Foreign Countries