Anytime someone says they're doing a slide presentation, my question is: Why? If they want to leave information behind, then do that with handouts. If they don't know their content, then learn it. If people expect to be disengaged, meaning not engaged in dialogue, change that and design the experience for dialogue rather than monologue. If they want to get people up to date on something, post it in a shared doc in real time where it belongs anyway.
It you must use slides, follow two rules.
- Have no more than two lines of content per slide
- Have more slides with just images than content.
The most influential media are stories, not lists of content bullets. And while you're at it, If you can't say something in 10 minutes, no one's going to be moved to action by it.