First, I’d like to see that everyone has at least three contentions. That’s the first goal.
Second, everyone needs a least 2–preferably 3–credible pieces of evidence to support those contentions.
Finally, every group should construct a plan for anticipating the opposition. What are their most likely contentions? How do you refute them? What evidence will they probably use? How can you make that evidence seem less credible.
Then, it’s time to write your constructives. I’ve given you those formats.
After all of that, we want to talk about public speaking. What makes public speaking effective and what prevents it from being awesome? Here is a short list of qualities
Poise—Do you appear calm and confident? Do you avoid distracting behaviors such as ums or brushing you hair?
Voice—Do you speak with clarity and appropriate volume? Do you avoid up speak or mumbling? Can you change your intonation to develop interest?
Life—Are you able to infuse your speech with personality and emotion?
Eye Contact—Do you look at us? Do you connect with your audience?
Gestures—Can you use your limbs in a way that adds to the speech? Does your body move to demonstrate your interest rather than your nervousness?
Speed—Do you speak at an appropriate velocity? Can you use pauses effectively?
 Taken from Erik Palmer’s Well Spoken: Teaching Speaking to All Students