hey!
maybe do something climate-related? I did my year 11 oral presentation last year on the school climate strike and there were plenty of points to address. for example, instead of wholly agreeing with one stance, I structured my arguments to address both sides of the issue. (however, the layout your teacher wants may be different to this)
here is a little summary:
argument 1: I argued that school students should be allowed to protest as we are the affected majority who will face the consequences of climate change in the future. (for this I talked about the already devastating effects climate change had and added some statistics of how it may affect us in the future)
argument 2: for my second argument I talked about how students have the capacity to influence political issues and also added more statistics to support my claim.
for my last argument, I addressed the opposition and discussed alternatives to protesting (e.g. reducing your own carbon footprint, limiting fast fashion. etc.)
anyway, I hope I didn't ramble too much and i hope that this is helpful. good luck