Abstract
A teaching experiment was designed to facilitate Year 8 students' understanding of algebraic
expressions and equations through the use of unknowns, patterns, relationships, and concrete
materials. This paper discusses the study's theoretical framework, the teaching episodes
relating to expressions, equations, and equals, the students' reactions to this instruction,
and their initial and final understandings of algebraic expressions, equations, and equals.
Exploration of the successful and unsuccessful teaching episodes emphasises the relationship
between instruction, prior knowledge and learning.
Tom .T. Cooper & Annette R. Baturo & Anne M. WiIliams
EQUALS, EXPRESSIONS, EQUATIONS, AND THE MEANING OF VARIABLE: A TEACHING EXPERIMENT