revise:
The researcher sent a letter to the principal of the Lagao National High School to be taken study to secure permission in order to conduct the study involving the school as the subject and asked them some questions regarding the past 11 years and present status of the school.
The researcher sent a letter to the principal of Lagao National High School requesting permission to conduct a study involving the school as the subject. The letter included several questions about the school's past 11 years and current status.