I teach fetal monitoring for my senior ADN class. We're one of the few undergraduate nursing schools around our area that still teaches fetal monitoring. Copyright infringement is very difficult to understand. We had a librarian with a PhD visit our community college and she gave a 6-hour seminar on copyright infringement. To this day, I still can't tell you what she said. Since we are an educational institution, we have some (albeit very unclear) exemptions. When I pull fetal monitoring strips off of the internet, I try to put the URL underneath. Do you have any strips at your institution you could use to show accels, late decels, etc? As long as you black out the patient's name, those strips belong to your institution and this is perfectly legal. If you choose to use Powerpoint, you can use a scanner to incorporate them into your Powerpoint presentation.
I use Powerpoint with my presentation and use a scanner, also insert strips from internet sites. PM me your address and I will be glad to send you a copy of my PP lecture on CD for you to use as a reference.