Follow the directions provided in the Google Docs page for how to create & secure your Google Slides
To add a new blank slide, right click the slide thumbnail and select New slide
To remove a slide click on the slide thumbnail that you wish to delete, and hit the delete
If there’s a slide you want to keep in your deck, but do not want to show when presenting, you can hide it. Right click the slide thumbnail and select Skip.
If you are working from an existing Slides document and want to change the theme, go to the Slide tab in the menu bar and select Change theme to preview Google Slides’ preset options.
Get to know the INSERT and the FORMAT menus!
Use an interesting font. To find more, go to the toolbar, click the font drop down and select "More fonts…."
To have students collaborate on a Google Slides presentation, one group member needs to create a Slides presentation. This can be done by asking the student to click on “NEW” in Google Drive and selecting Slides presentation. If you are using Google Classroom, create an assignment with no attachments. Instruct the “group leader” to click on the “OPEN” button and click on “Add” to add a Slides presentation.
The “group leader” will want to click on the blue share button and add the email addresses of group members to allow them to edit the Slides presentation. Google Classroom will automatically share the presentation with the teacher. If you are not using Google Classroom, the “group leader” will want to add the teachers email address to the sharing permissions.
Add-ons are independent apps you can add to Google Slides to increase its capabilities.
Here is a list of some of the best add-ons for Slides