The purpose of this study was to examine the effects of constructive teaching program. In order to accomplish this purpose, the researcher designed an English teaching program based on curriculum integration, constructivism, and second language acquisition theories. The participants were 36 eighth-grade students. With the use of portfolio process assessment and thinking-aloud, the data were collected. The results indicated that the students became more confident and willing to learn English after the teaching. At last, the researcher provided a discussion and gave some recommendations for English instruction in the future.