I use the version of Moodle 2.2.10 + and I need to give permissions to a tutor (professor without permission editing) so you can show or hide activities, but can not update them. I have seen that in the class definition is possible roles off the icon to show / hide activities (eye) when we activate the edition, but not the update icon, which always appears. Any idea? I guess making changes to the code can get, but do not know how. Any help? Thank you very much.