I have started two courses on https://customer-academy.databricks.com/learn/courses/

for example : 
https://customer-academy.databricks.com/learn/courses/2469/get-started-with-databricks-for-data-engi...

But I cannot find where I can download the slides so I can read them offline.

Also the course has a Demo walkthrough about : 

Demo: Creating and Working with a Delta Table

I have created an account in :

https://dbc-a64eb4e321b-c123138.cloud.databricks.com

but I cant find where to download the notebook the instructor is using to do it as well.