Each school maintains a calendar for the purpose of advertising activities associated with that school. The School Board office also maintains a calendar for district-wide events, and as a way of viewing one or more schools at one time in a merged calendar. Parents with children in more than one school will find this useful.
Go to the CCPS schools calendar here and in the upper right, click on the drop down menu titled "Apply a Filter." Select the calendars you wish to view simultaneously.