Abstract For the last 4 decades, the philosophy of Sufficient Economy has become the country's new approach to drive strategies and policies in all fields of development for Thailand. Based on rationality and knowledge about the Sufficient Economy Philosophy, the philosophy is taking steps into the school curriculum and various school activities at all levels. A goal has been set for schoolchildren completing basic education to have better knowledge and understanding about this philosophy and be able to apply it in their daily life. This study presents an evaluation of school activities in a project which aims to develop student's desirable characteristics based on the Sufficient Economy Philosophy using a model of Context-Input-Process-Product (CIPP). The project recruited school administrators, teachers, students, and parents in Northeastern region of Thailand as participants for this study. Multiple sources of data have been obtained by in-depth interview, focus group discussion, and questionnaire. Both quantitative and qualitative methods were used to analyze the obtained data classified into four aspects such as context, basic factor, process, and product. Results indicated that the participants perceived all aspects in a high level and they responded positive perceptions toward the activities.