Abstract
This paper aims at presenting the preparation for Schema Theory, including language and cognition, construal, and categorization. Also, it shows the definition and history of schema, highlighting the role of schema building as a powerful approach for maximizing International English Language Testing System listening teaching, expounding the benefits and challenges of schema theory in IELTS listening teaching as well as making recommendations for IELTS teachers regarding how to implement schema theory effectively. Two investigations in this work about using schema during classes were implemented for IELTS teachers and students and proved the necessity for teaching with schemas in the IELTS listening part.