In my workshops I have referenced a number of places to find pre-made smart notebook lesson templates. The site I most often reference is www.smarttech.com. This is the home page for the company SMART. There you can access notebook lessons organized by grade, subject, and/or CCCS.
Smart has introduced a new site that I have found to be an even better resource. It is called the Smart Exchange. On the Smart Exchange you can search for notebook lessons by subject, grade and topic. You can also upload lessons that you made to share with others.
What I like about the Smart Exchange is that you can preview the lessons directly in the browser without having to download anything. You can also view a rating scale to see how other teachers have rated the lesson.
This is a great place to get started with using the Smart Notebook Software. If you search for a lesson on a topic you will working with students on, you can download it and then make changes to it. This is the best way to get acquainted with the notebook software.
I also publish a lot of resources including lesson templates, interactive sites and tutorials on my wiki http://edunology.wikispaces.com. Once you are on the wiki please click on Interactive Whiteboards on the navigation menu.