To view the substitue calendar simply open
Google Calendar https://calendar.google.com
Scroll down on the left hand side and expand “Other Calendars”
Then copy and paste this url into the box and hit enter. The substitute calendar is now in your list.
LINK BELOW
pmhschool.com_d6df0be48fd03f10f4d2eaa9e98bef9d@group.calendar.google.com