I am a big believer in the helpfulness of digital calendars. Both at home and at school I have detailed calendars marking out all of my temporal obligations for as far out into the future as I can.
My school, like I am sure many others, has a rotation schedule that matches no calendar software on the planet. For many years I was forced to copy and paste each of the four calendar permutations throughout the school year to get my class rotation into my school calendar.
Last year I realized that calendar programs can import events from .CSV files. I went down the rabbit hole and came out the other side with a CSV file template that I could share with all of my teachers, staff members, and students. As a result, they could do a few simple search and replace functions to personalize a copy of this CSV file and have all of their class obligations in their calendar for them for the year.
Here is the post, with a screencast and screenshots, that I share with everyone.