Abstract:
The objectives of this study were to 1) study the school administrators leadership, 2) study the school effectiveness, and 3) study the relationship between the school administrators leadership and the school effectiveness under the Pathum Thani Primary Educational Service Area Office classified by educational service area, gender, age, educational level, position and work experience. The sample used in the research were 335 government teachers under Pathum Thani Primary Educational Service Area Office 1 and 2. It was selected using the table of the sample size of Krecie and Morgan with stratified random sampling and simple random sampling. The instrument used for this research was a 5-level rating scale questionnaire with the value of the reliability at 0.96. The statistics used to analyze the data were percentage, standard deviation, mean, and Correlation Coefficient.The research findings were as follows 1.The leadership of school administrators under Pathum Thani Primary Educational Service Area Office was overall at a high level. Directive leadership was the highest, followed by supportive leadership. Participative leadership was the lowest. 2.The school effectiveness under the Pathum Thani Primary Educational Service Area Office was overall at an average level. The ability to develop students positive attitude was the highest, followed by the ability to change and develop the school. The ability to solve the problems in the school was the lowest. 3.The relationship between the leadership of school administrators and the school effectiveness showed that directive leadership, achievement-oriented leadership and supportive leadership all had high positive correlations with school effectiveness. Participative leadership had a moderate correlation.