You can add PowerPoint slides as a page in your section via Web Content Tool by using Slideshare.net.
With Velop, slideshow presentations can be accessed right in your online class without having to open another window or leave your page.

Sign up for a free slideshare.net account
Upload your slide presentation with the orange button on the top bar

     

Choose your file and upload

     

Access your presentations under My Uploads in the account tab, top right

    

Open which slide show you want

    

Click Embed at the top

     


Highlight and copy from "http://..." to the embed code number "...code/29938747"
Do not copy the whole link, it will not work in Velop

      

           For example, if you are looking at the whole link only copy this part:

          

Next, in your section, Add a Web Tool

    
 
Paste the URL into the Web tool under Settings by double clicking on the tool

    

Resize and move the tool how you wish

    

Publish before viewing section. 
In the live section, users can scroll through the slides