The purpose of this study was to clarify contribution of a student's school and child support activity in public school to foster a student's competence comprising both a theoretical and practical viewpoint. To achieve this purpose, we performed three analyses. The first is questionnaire survey for the students engaged in learning support in junior high schools. The second is interview for the students engaged in learning support in an elementary school. The third is interview for Faculty of Education of Shimane University that has already had advanced system of this field. Through these analyses, we indicated importance of supervision for students to foster a student's competence comprising both a theoretical and practical viewpoint and showed an action policy on fostering the competence.