Need help writing a speech

So hi guys,
I go to a french school and the teacher gave us a task to write an speech about any social issues so I chose discrimination toward minorities. I have no clue where to start so it would nice if you guys could give me a starter kick. I don't necessarily want you to write the speech for me. One last thing, my grade is around 85% in english and as I am in a french school, the teacher would find it suspicious if I had a big ass speech worth like Martin Luther King. A 80% would be good for me.

PS: I can change my subject anytime so if you feel more confortable writing about animal cruelty or disparity between rich/poor, it is all yours.