What does it mean to “call in?”

Photo by Christina @ wocintechchat.com on Unsplash

It is a truth universally acknowledged — albeit not always accepted — that to err is to be human. No one is perfect. Making mistakes is unfortunately the most effective means through which humans learn new things. As a teacher, I encourage my students to make mistakes; making a fool of yourself in a controlled environment is the best way to learn how not to in the future.