When you want students to deliver speeches, it's helpful for them to analyze good models.
Here are some handy Websites for analyzing and delivering speeches:
American Rhetoric-Top 100 Speeches--PS, it might be fun and useful for students to analyze the top 5 or 10 and figure out the criteria for what makes them great.
Speeches--The Writing Center at UNC-Chapel Hill (offers guidance on how to write and deliver a speech)
For rubrics to judge speeches, check out the Oral Fluency Rubrics page.
For how to run mock trials (or mini-mock trials), check out Teaching Civics.
If you have any suggestions for additions to this page, please let me know! Email me at email@example.com.