Any lesson that has notation associated with it is on the the lesson page, either to the right of the video player or below it.  Often the first and sometimes second lessons of a tutorial don't have notation because the first is usually a welcome/intro lesson, the second often covers gear & tone.  But by the third lesson and beyond there is notation on the page with the video.

There is an option to hide the notation on any given page.  If available notation is hidden there is a button below the video player to 'Show Notation'.  clicking that button will make the notation appear. 

What lesson are you not seeing notation on?