If you are visiting this site to find lessons related to the New Orleans Jazz National Historical Park, look to the menu on the left. You will find a page there entitled National Jazz Park Lesson Plans. A number of lessons are then arranged in order, below that page.
You may also check the links page to visit the Jazz site directly, or use this.
At this time, the lesson plans are posted here on my site with a link from Jazz, so my site for the time being is the best place to get the Jazz lesson plans.