I might be new in freelancer and bad in English but my presentation is second to none (self-claimed).
I create presentation in 3 ways:
1. Professional templates, are your install-and-use templates that work just like the official MS Office templates.
2. Self-built template (self-named), is an advanced type of templates that doesn't rely on .POTX, but rather by using the rough draft of presentation which you held. Is effectiveness will increase by considering other aspects such as your company logo, vision and mission, etc. These type of templates is hard to reproduce or to be used for other presentation.
3. Combination templates, are a combination of the previous ways of creating the template. It is extremely brain consuming as well as time consuming but the result is worth it. These types of templates were able to be used in other presentations, but its effectiveness will decrease when used.
Based on that, I assume you will need work from point 3. That is why for your request I will need:
1. Rough draft of your presentation (powerpoint)
2. Your major (greatly affect the presentation theme)
3. Your presentation target (Lecturer? audience? student? this will hugely affect the way presentation delivered)
4. The target gender / majority gender (will affect their preferences)
5. The target educational level (/majority) (optional, might not needed)
You should know that this is exactly what you will need in order to make your presentation delivered flawlessly.