There are a few presentation skills you can focus on when you are planning and delivering your speech.
Watch your language
Keep it simple.
Emphasise the key points. Repeat them using different phrasing.
Check the pronunciation of difficult, unusual, or foreign words beforehand. This is especially important for international students.
There will probably be international students in the audience so avoid slang, idioms and acronyms.
Use your voice
Speak loudly enough for everyone in the room to hear you (remember the people at the back).
Speak slowly and clearly. Don’t rush! Often when we are nervous we speak too quickly.
Key words are important - say them slowly and loudly.
Vary your voice quality. Look at some videos of good public speakers to hear how they use their voices to engage their audiences. See the video with Barack Obama's speech for inspiration.
Use pauses - don't be afraid of short periods of silence. They give you a chance to gather your thoughts, and your audience a chance to think. Pauses also give people time to take notes, or time to think about what you are saying.
Sometimes doing some warm-up activities before we speak can help us prepare. You might want to watch these short videos (4-8 minutes each), to help you to prepare for your presentation.