Doubt about speech

Hi guys, Dont know if this is the right section to post my problem but here it goes:
In one of my school subjets I have to deliver a speech, my problem is that i have no idea of what to talk about.
There are only two restrictions: the theme must be educational and i can only talk for 5 minutes. So, if you have any idea that might help me please write it. Thanks in advance.
Answer #1
Why not speak on the advent of “” and its impact on the industry , prices , and the pottential effect of the trend on future releases , the subject is vastly expandable kind of like ^^
Answer #2
Talk about looking after the environment, your teacher will love it
Answer #3
threeothree and thanks for your replys.
Talking about i think it might be a little too much for my teacher ( he gets nothing about technologies and internet)
About the environment i’ve already spoken about that…… Look forward to read your opinions