1. Click on the Add/Edit tab of your Page column (on the left)

2. Next, click on Add a page.

3. You'll name the page and hit Insert.

 

To add text to a page (again making sure you've hit the Edit tab of that new page) -

 

1. In the Add a Module box, you'll click on Rich Text

2. Then click on Add This Module (towards the button of the box)

3. Scroll down just a bit and click on the Edit tab of the new box, and add your new material.

4. Be sure to save and publish as usual when you are done.

See the links below for more detail: