You can begin by listing numbers and then say "these are the number of mental health cases of teens in the duration of lockdown" and then go on to start your speech. You don't want to have a flurry of statistics, so keep them to a minimal. You can include studies and surveys etc, but you want your speech to be more emotive so try and just sprinkle the facts in so it doesn't seem like you're reading an article. I would say as your audience are teens, maybe use direct language, as it will defo be a relatable moment. Also prepare for questions, have notes ready to refer to with prompts or small facts so you don't feel overwhelmed. Most questions come about the end of the speech as that's the memorable bit, so that would be a good bit to prepare for. Don't forget to breathe, take it slow, no one is actually judging you no matter how much you think that - everyone is too busy obsessing over their own performance, I promise! Don't feel like you have to fake a persona, be yourself and be comfortable to own that, it's makes you seem authentic and confident. Read your script over so that you have it slightly memorised, you don't want to be reading off of paper the whole time or else you get marked down, but at the same time, don't feel like you have to completely memorise it, you can still look down at your paper from time to time. Make eye contact with the audience, but if that's too much, make eye contact with your teacher and friends, but if that's again too much, just glance around, you don't have to hold contact but just having a quick overview around still makes you seem like you're interacting with the audience. Look at the back of the classroom, that also makes you look like you're holding contact. Don't have a compact body language, make yourself open, good posture, arms to the side, walk around a bit, no lowered head. And just enjoy it, don't think of it as an exam bc it really doesn't feel like one in the moment. It feels like a regular class activity and everyone is really chill. Everyone in my class got distinction with a few merits. I can't remember if there was a grade above distinction but I don't think there is? Either way, everyone gets good grades bc the teacher wants to award you grades not take them away. I hope you take something helpful away from this and I wish you all the luck for your performance, you'll smash it!!