The Encyclopedia of Seventh-day Adventists, which you can access at https://encyclopedia.adventist.org/, has all sorts of articles on a variety of subjects in Adventist history. Any article would likely be an excellent choice for you to tell at Sabbath School, in the classroom, or from the pulpit.
This site (3)
Other sites (3)
Seventh-day Adventists believe in inspiring those around us to experience a life of wholeness and hope for an eternal future with God.