The Diversity of Learning Materials in Enhancing English Proficiency: A Review on Cambridge IELTS Test Papers

The study aims to explore the diversity of learning materials in enhancing English proficiency by evaluating Cambridge IELTS Test Papers. This study thoroughly evaluates the Cambridge IELTS test papers ranging from volume one (1996) to volume seventeen (June 2022). While analyzing study results using the cognitive ability of the authors, this study also uses secondary data collected from videos, journal articles, Cambridge IELTS test papers, and organization websites. This study finds 1082 categories of various topics under 22 different areas related to art, academic, agriculture, archaeology, business, culture, economics, education, entertainment, environment, health issues, history, human resources, information technology (IT), language, media, psychology, science, social issues, sports, transportation, tourism, and miscellaneous. Science and academic areas cover most topics; eventually, business overtook all. In addition to the diversity of learning materials, this study also critically defines the diversity of range, length, source, and test format assessment criteria. Finally, this study presents a set of guidelines for improving language skills among learners. Within the guidelines, we argue that English language learners should start learning with preferred topics and proceed to learn with enough variety of learning materials daily. They can make a plan for one week with enough variety and must stick to that study plan. Listening is an excellent start to becoming a master of a foreign language. This set of guidelines is a complete guide to learning English, from which IELTS test takers would benefit. However, this study needs more evidence from empirical research about to what extent the diversity of learning materials influences learning levels among learners worldwide, which future research could cover.