Teaching the addition and subtraction of integers in Lower Secondary School: An Inclusive and Inquiry-Based Approach

This paper presents a proposed teaching scenario for the instruction of addition and subtraction of integers in the first grade of lower secondary school, aimed at students with or without learning difficulties. The scenario applies principles of discovery learning and emphasizes the use of both manipulative and digital tools, such as the number line and GeoGebra. Through mathematical projects, students actively construct knowledge by discovering sign rules and transformation of operations. The goal of the teaching plan is to enhance conceptual understanding and to foster student engagement.