I'm 30 years old. This is what I would suggest to my younger-self in school: 1. Practice in front of the mirror. This should be the only thing in your mind until the presentation is finished. Either you're awake or asleep, keep thinking about the presentation and keep practicing. 2. If the teacher knows, most probably your classmates too. Still, before the presentation just tell them "Be patient with me. I stutter". Or in any easier vocabulary. Let your friends know before presentation about how you feeling. So once you're back on your seat, you would feel safe and home. Trust me, once you put out there yourself about you stuttering, you start owning your stuttering. Not otherwise. It will help you in presentation. 3. Keep smiling while presenting. This will ease your anxiety. And if you stutter, smile even more. Grunt happily. Everyone would see you're trying your best, no-one will laugh but motivate you to finish it. 4. Finally, don't ever let stuttering dictate your life. Everyone has their hurdles and this is yours. It seems like other hurdles are easier to overcome because we're not experiencing them first-hand or people have overcome in the past and laid out blue print of it for the future.