How can I let my colleague see my course materials?
You can add your colleagues as "Non-editing teacher" to your course. Non-editing teachers can only visit your course page but cannot editing anything.
To enroll a non-editing teacher you can follow these steps:
Go to the course page.
Click "Users" menu from the Course Administration.
Click “Enrolled users” option and list the enrolled users.
Click "Enroll users" button on the top right of the list.
A pop-up window will appear. On this window search the list of users to find your colleague typing e-mail address to "search" box. When you find your colleague click on the user and you will see that your colleague's name is added next to "Select Users" title.
On this window select “Non-Editing Teacher” option from the "Assign role" dropdown menu.