Text ( visual ) : unmediated Principal leadership. -- High school ed.. -- Vol. 1, no. 1 (Sept. 2000)-v. 9, no. 10 (June 2009). -- Reston, Va. : National Association of Secondary School Principals , 2000-2009. -- v. : ill. ; 28 cm. -- Title from cover ; Issue vol. 9, no. 10 (June 2009) called Special issue ; continues : Schools in the middle : theory into practice / National Association of Secondary School Principals (N.A.S.S.P.) ; continues : High school magazine : for principals, assistant principals and all high school leaders ; continued by : Principal leadership. -- ISSN 15389251 ; (AA11572067) ; https://ci.nii.ac.jp/ncid/AA11572067 Other Title(s): Princ. leadersh (High sch. ed.) ; Principal leadership (High school ed.) ; Principal leadership. High school edition. -- Author Heading(s): National Association of Secondary School Principals (U.S.)