To change centre of the front page:
1. Go to Front page > Edit settings and change "Front page" to None all down. Change "Front page item when logged in" to None all down. Ensure that "Include a topic section" is checked.
2. Save changes and return to the front page.
3. Turn editing on, and you should now see the "Add a reource" and "Add an activity" drop down .
4. Select "Add a resource" and select "Insert a label". You can then edit the label in anyway you want to be in the HTML editor.