This study investigates the relationship between strategic reading instruction, the process of learning second language‐based reading strategies and English reading achievement for Thai university students of science and technology. In a course in reading general English texts for 16 weeks, 82 students were taught using a strategies‐based approach (experimental cohort), whereas another 82 students were taught using a traditional, teacher‐centred approach (control cohort). A pre‐test/post‐test research design was employed, and a portfolio approach was used to investigate the experimental cohort students' process of learning reading strategies. The results showed that the experimental cohort outperformed the control cohort in the post‐course standardised English test. The higher‐level reading proficiency learners in the experimental cohort were also found to be better than their low‐level peers at learning to use second language‐based reading strategies effectively. Implications are discussed for alternative instructional practice of reading in English as a foreign language (EFL).