The purpose of the present research was to identify the differences between some various schooling aspects at one U.S. high school and one girls Kingdom of Saudi Arabia (KSA) high school. In particular, the studied objectives include lessons plan, program assessment, teacher credentials, school culture, and intramural activities. This study was conducted using a mixed-method approach. The obtained results allowed making some specific recommendations that could be considered by the Saudi teachers and school administrations to improve simultaneously the learning process, employee satisfaction, as well as students’ engagement and motivation. This case study will help to improve both systems through sharing success strategies. Also, it will help families who moved from the United States to Saudi Arabia or the opposite to understand the differences between these education systems for their children’s success. After the data collection and analysis, the researcher concluded that there is no one of these educational systems better than the other. If we could merge these two school systems, we would have the best educational system for students’ future success.