To manually add the HighSchools calendar to your Google Calendar, follow these steps:
  1. Browse to your Google Calendar.
  2. On the left side bar click on the arrow next to Other calendars, then select Add by URL:

     Other Calendars

  3. Enter the following URL in the field provided:

    Add By URL
  4. Press 'Add Calendar'.
  5. You should now see the HighSchools calendar in your Other calendars list.
Coronado Calendar  
Doherty Calendar of Events  
Mitchell Calendar  
Palmer Calendar  
Bijou Calendar  
ECHS Calendar