Background, the context, and purpose of the study: With the prosperity of STEM education, engineering thinking has emerged as a crucial component of engineering education. However, current STEM educational practices do not totally promote engineering thinking among students at junior secondary schools. This paper presents a study that investigates the effects of teaching innovation, specifically the Engineering Integrated Science (EIS) curriculum, which integrates engineering design into science classes. The study aims to explore the impact of this curriculum on the development of junior secon...