There are miscellaneous variables in a speech evaluation apart from organization, content, delivery, and multi-media support. Here are a few:
Timing: Speaking too long is almost always annoying, and speaking too short can be disrespectful. I usually assign a penalty for speaker going too long or too short. Having a clear clock or some sort of time-feedback system is very helpful in this regard.
Outlines: Always a good idea. Use them to provide feedback before the speeches. (More work for you produces better speeches for them.)
Inappropriateness: You had them clear their topics with you. You looked at their outlines and gave them feedback. Yet, there’s that jackass in class giving a speech that is offensive to all. Always have a policy to interrupt a speech for good cause, and don’t be afraid to use it. My phrase of choice is, “Thank you, that’s enough. Please sit down and see me after class.” Fail the speech.
Audience Analysis: This is part of the speech writing process, which I’m avoiding on this web site. However, some instructors build in some sort of “did you reach your audience” rubric into the speech grade.
Feedback/Audience Evaluations: Some instructors have the audience reactions as part of the speech grade. I have even seen the use of “clickers” for real-time audience reactions!
Video Recordings: Some instructors have students evaluate their own performance by viewing a video recording. This can be very effective, but please remember that having a camera pointed at a student increases his or her anxiety by an order of magnitude! Also, for online teachers, having proper recording and viewing technology is a must!