I lecture upto 4 times a year to students & adults about the history of papermaking. About three years ago I found a brilliant alternative to using slides or Microsoft Powerpoint.
It is called Slide Rocket.Very easy to put together & you can add audio & use images without worry from Flickr accessed directly via Slide Rocket.
There is a free version & a professional version which costs.However you can trial the professional for free for a while. Essentially the difference between the two is with the free version you access the presentation via the internet whilst the pro version enables you to download to your computer or USB stick.
This is useful if there is
1.a question mark about internet access where you are giving the talk.
2.Internet speed is slow or variable.
If, like me, you sometimes need to give a talk to a group that hasn't got the equipment to throw an image from a laptop onto a larger screen just ask the organiser to get someone to bring a Tv with a SCARTcable connection so you can hook up your laptop. To throw the image onto the TV you need to press the Fn & F8 keys on the laptop simultaneously.
I'm in no way connected with Slide Rocket and I thought I'd pass it on as a tip. Here is a presentation I made this year. Turn up the sound.
http://portal.sliderocket.com/AEEZH/Strawberry-Hill-Wallpaperhttp://www.sliderocket.com