If your teachers are like mine, they not only grade on the information in the presentation but also how it looks. If it looks like a bunch of random pictures and textboxes with Ariel font, you won't get very far in that department. So, here are some tips from someone who gets compliments from teachers on how my slides look.
1. Get all of your information. Obviously.
2. Add one slide to the title slide that should automatically be there. (the button looks like a plus sign with a dropdown arrow. Don't worry about the arrow right now. I'm using a slide I have to make an example).
3. In the same row you just added a slide, there should be a button called "Theme", click it.
4. There should be something like this popping up on the side. Choose any theme you want, there is a bunch to choose from. If you want, you can download a theme from a website as well, and use the import theme option, however, it's not necessary. I'm using Paradigm for this slide. Make sure it looks good on both your first (title) slide, and your second (normal) slide. Don't mind the colors, you will change them.
5. Close out of themes once you have picked one. Click "View", then in the dropdown menu, click "Master".
6. Once you click Master, there will be a bunch of different layouts for different types of slides. But for now, just click "Colors". It will be around the same place that "Theme" was in normal view. Something like the picture will show up. Click "Choose a theme color". You can mess around and change the colors in your presentation. I have changed mine to fit my topic, which is a person name Ariel Bloomer, and she has bright pink hair. But be careful and make sure your background and text colors are readable, you can go through the different layouts and do this.
7. Alright, you've got your theme and colors now. Go to the Master slide. This is the one shown separately from any of the layouts. Click on the text boxes and change their fonts. You can change them to anything, but don't make it unreadable, silly (Permanent Marker for example), nor cursive. If you don't have many fonts, you can click "Add Fonts" and just click some you think are good for your presentation, then you can select them.
8. Close out of Master view. You are now left with your slides. Use different layouts to show your information however you want, whatever you think looks best. Do not make your slides cluttered, use a small number of pictures if possible.
9. Right next to where you clicked "Theme", click "Transition". Another side will show up. Choose a transition from the dropdown, I have chosen Flip, however, I recommend Flip, Cube, Fade, and Dissolve. It depends on your theme and what looks best honestly. Choose "Apply to all slides".
10. And the step that may be a little extra. If you want to, try adding some animation to your slides. While you still have "Motion" open, click a text box or something you have on your slide. Then click "Add Animation", and you can have it fly in from up, down, left, right, anywhere, among other things when you or the teacher go to that slide. If done correctly, it will look really cool. Mess around with this, choose what looks best.
11. When your slide presentation is complete, you may wonder how to end it well. Now, I usually add a touch of humor into the end slide. A couple of things I have done are making a blank slide, making the background a picture of the Looney Tunes "That's all folks!" ending. Another is a big textbox with "The End" and in the lower right corner having a text box saying something like "Why are you reading this? Leave. Why are you still reading, the presentation is over? Here, I'll stop typing so you can stop reading. Go get a hobby, adopt a puppy, plant a tree, just do something better with your time than reading this."
(All pictures were removed, unfortunately)