ABSTRACT Safina, Ari. (2023). Derivational Affixes found in Reading Texts of Textbook Entitled Bahasa Inggris for Eleventh Graders. A Paper. English Education Department. Faculty of Education and Teacher Training. Universitas Tidar. Keywords: Reading, Derivational Affixes, Textbook In 2017, the Ministry of Education and Culture of Indonesia launched the revision of a textbook for the elevent…