Select a topic for your 5-6-minute informative speech. I encourage you to use the same topic for your informative speech as you do for your persuasive speech. When it’s time for the persuasive speech you will put a persuasive spin on the informative speech topic (e.g., informative topic: vegan diet; persuasive topic: adopt a vegan diet). This approach will allow you to immerse yourself in research on a single topic rather than researching two separate topics.
The speech is only 5-6-minutes in length. This requires a very specific and narrow topic. If you keep the same topic for both your informative speech as well as persuasive speech, you can inform your audience on the topic with this speech and then delve deeper in your persuasive (which is also a 5-6-minute speech).
Review
I always find it helpful to see multiple examples of how to format something or to get ideas. Take a look at these examples from past students. 

Student Examples ~ Topics