If you hope to work in academia, it can be important to have some teaching experience. However, some graduate students may study in departments where there are not as many teaching assistantships or opportunities to serve as a primary instructor of a class. Here are some ways to get some teaching experience if you do not have a teaching assistantship.
Read more here: https://www.unl.edu/gradstudies/connections/finding-teaching-experience-when-you’re-not-ta