For most speeches, there are three parts — introduction, body and conclusion.
However, different components should be present in each of these parts.
Here is a classic speech model. It basically mirrors an essay.
Introduction of Main Points (usually 3 to 5)
Supporting Point 1
State the point
Support the point with research — cite sources of information as you go.
State an example
Supporting Point 2
Supporting Point 3
Summarize the speech
Reiterate the initial point and tell the audience what you think the information means to them.
This speech outline is not set in stone and can be adapted, but this style works well for many people.