2008 Oklahoma Ag Day Bulletin Board, Poster and Essay Contests Agriculture: Cultivating Oklahoma's Future Postmark deadline for all entries is December 3. Bulletin Board Contest: Grades PreK-2 Information Letter Contest Rules Entry Form and Summary Sheet Lesson Poster Contest: Grades 3-5 Information Letter Contest Rules Entry Form Summary Sheet Lesson Storyboard Contest: Grade 6 Information Letter Contest Rules Entry Form Summary Sheet Lesson Essay Contest: Grades 7-8 Information Letter Contest Rules Summary Sheet Lesson