Where do you find the tutorials?

I've been watching Camile's lessons and she often says that if you want to know more about a particular topic, to see her tutorial. Where are the tutorials? I can't find a list.

Tutorials are the shorter lesson series on the site, found here:

https://www.30daysinger.com/advanced

https://www.30daysinger.com/techniques

https://www.30daysinger.com/warmups