Proceed with caution! Removing default student permissions may prevent students from accessing files linked in your course site.
Select Resources.

In the target Sakai site, select Resources from the Tool Menu.
Select Permissions.

From the Actions Menu, select Permissions.
Edit permissions.
For each role, check off the checkboxes to add a permission. Uncheck the checkboxes to remove a permission.
Note: If the site contains defined groups (in Site Info), you may also use the drop-down menu Set permissions for to change the permissions for a single group.
Select Save.

Select Save to save changes.