Research Based Instruction: Widening Students' Perspective When Dealing with Inequalities

A joint research study involving Israeli and Italian students is described here. This paper aims to suggest a possible research based approach to encourage introducing algebraic situations from a general and global point of view. Inequalities were chosen as one possible illustration. The students' ways of reacting to standard and non-standard tasks that underlie a similar mathematical idea are investigated, in view of drawing implications for teaching.