The main thing I've found with presentations is to not have a script too rigid. If you plan out every sentence and use keywords to remember what to say next, you feel obliged to say those words and makes it more difficult in the moment to alter your presentation to new words slightly to fit around your stutter. This might not work for you personally, however I would suggest only intending to walk in to your presentation with a general idea of the topics you want to talk about and some minor details in places. This lets you focus on the content and distracts yourself from your speech. If you have already made a very detailed script or plan, you could try to add and remove things as you feel might work on the day. Good luck on the presentations, hope something here helps you.