I've never stumbled on any research articles about leos unfortunately.. Though any cool research you find I'd be curious to see.
Things you could talk about:
how they obtain calcium (licking sand and stuff)
how they get their D3 (I've read somewhere that despite being nocturnal they might bask at dawn and dusk when the sun isn't as intense)
Waters needs and food needs
And that's all I got.... That's a cool assignment, I wish I got to write about leopard geckos. Good luck.
I did find some stuff. One was about exposing different light patterns to incubating eggs and the hatchlings preference for those lighting patterns.
There was another, that was very interesting, about nocturnal desert reptiles adaptations to survive in cooler temps. It was very in depth. Talked about stuff like VOmax and functioning at lower than optimum temperatures. I might still have the articles if anyone is interested.