What is a extemporaneous speech?

An extemporaneous speech can be defined as - impromptu (not planned or scheduled); or scheduled and planned for, yet not read from a prepared speech or outline when delivered.

http://homeworktips.about.com/od/speechclass/a/impromptu.htm

It utilizes the best aspects of the other three methods (manuscript, memory, and impromptu), while balancing their respective weaknesses.

Extemporaneous speaking is a speech and debate event. It is where you are given three questions about current events and asked to choose the one that you believe you can best answer. You then have...

I was actually looking for an answer my self but it seems like you start with an intro (preferably about some historical or everyday event) say your question and your opinion then state your two to...