Hello Dave,
Good question. it looks like you’re already using Yoast’s SEO plugin. What you’ll want to do is change its settings so that the slides are not indexed. That way they don’t appear as separate content, but only as part of the home page.
Next you’ll want to remove any leftover sample or default content. That wY only content about your program will be there.
After that you can adjust the site map that’s part of Yoast’s plugin to show Google what is important. That will help improve Google’s site links. It might take a little while for that to take effect, but that’s where I’d start.
If you have any questions, just let me know.
Have a great weekend,
Bill