User notices plugin
Use notices plugin to create announcements for everyone: guests, logged in users, students, teachers. You may also display announcements for specific user/users using user ID number. Announcements can be display throughout the entire site or on specific page only, for example on front page, course page, dashboard page, calendar page or login page. Additionally you may set date and time when announcements will start and finish publishing.
For each announcement you may set predefined style or set custom style, background color and text color. You may also select region to display announcement (top, content or bottom). Notices plugin allows you enable/disable close button, so you may decided if user can close specific announcement.