/usr/share/debian-edu/menu/ is in education-menus 1.812+deb8u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/debian-edu/menu/menus/
/usr/share/debian-edu/menu/menus/applications-merged/
/usr/share/debian-edu/menu/menus/applications-merged/art.menu
/usr/share/debian-edu/menu/menus/applications-merged/astronomy.menu
/usr/share/debian-edu/menu/menus/applications-merged/biology.menu
/usr/share/debian-edu/menu/menus/applications-merged/chemistry.menu
/usr/share/debian-edu/menu/menus/applications-merged/computerscience.menu
/usr/share/debian-edu/menu/menus/applications-merged/construction.menu
/usr/share/debian-edu/menu/menus/applications-merged/economy.menu
/usr/share/debian-edu/menu/menus/applications-merged/electricity.menu
/usr/share/debian-edu/menu/menus/applications-merged/geography.menu
/usr/share/debian-edu/menu/menus/applications-merged/geology.menu
/usr/share/debian-edu/menu/menus/applications-merged/graphics.menu
/usr/share/debian-edu/menu/menus/applications-merged/history.menu
/usr/share/debian-edu/menu/menus/applications-merged/kde-essential.menu
/usr/share/debian-edu/menu/menus/applications-merged/kids.menu
/usr/share/debian-edu/menu/menus/applications-merged/languages.menu
/usr/share/debian-edu/menu/menus/applications-merged/literature.menu
/usr/share/debian-edu/menu/menus/applications-merged/math.menu
/usr/share/debian-edu/menu/menus/applications-merged/miscellaneous.menu
/usr/share/debian-edu/menu/menus/applications-merged/music.menu
/usr/share/debian-edu/menu/menus/applications-merged/physics.menu
/usr/share/debian-edu/menu/menus/applications-merged/robotics.menu
/usr/share/debian-edu/menu/menus/applications-merged/sports.menu
/usr/share/debian-edu/menu/menus/gnome-applications.menu
/usr/share/debian-edu/menu/menus/is-enabled
/usr/share/debian-edu/menu/menus/kde-applications.menu
/usr/share/debian-edu/menu/menus/mate-applications.menu