This study investigates the impact of a scientific approach on English for Specific Purposes (ESP) students' reading comprehension achievement and engagement in Indonesia. While conventional approach has been prevalent, this study investigates whether a systematic, evidence-based approach could enhance students' understanding of complex texts and increase their motivation and participation in learning activities. The study uses a mixed-methods design that includes comparisons of pre- and post-tests, questionnaires, and interviews. It finds that the sci