Corpus linguistics contributes significantly to numerous fields, including lexicography, it has a crucial and effective role in providing valuable linguistic data, and empirical evidence of language use, enabling the construction of more accurate and comprehensive dictionaries, and reflecting how language is used in real-world contexts. Corpus linguistics has revolutionized the way dictionaries are constructed, compiled, and revised. Corpus linguistics has benefited from developments in computational linguistics, particularly in Natural Language Processing (NLP), providing a set of tools that greatly contribute to the processing, analysis, and exploration of language data. The primary objective of the paper is to demonstrate and highlight the effectiveness of using a textbook-based corpus in the development of school dictionaries. The research aims to explore how this corpus linguistics methodology, coupled with NLP tools, contributes to creating contextually relevant and pedagogically oriented dictionaries for educational purposes. This paper introduces a novel model for building corpora specifically designed for school dictionaries. The model’s effectiveness is demonstrated by creating a corpus from a single Arabic language textbook through a detailed methodology and a real-world use case.