This research studied the effectiveness of the integrated approach in English as a Foreign Language (EFL) classrooms and how it related to students' 1) achievements, 2) critical thinking skills, and 3) attitudes toward reading literature. To ensure that the results were accurate and reliable, the experiment was conducted in two different regions. It was found that the results from both locations were similar. Specifically, the achievement test scores, critical thinking skills improvement, and attitudes toward reading literature of the experiment groups were significantly higher than those of the control groups. This indicated that the integrated approach was effective.