The phrase "textbook example" means a clear and perfect example of something. It is often used to describe a situation or action that perfectly represents what is expected or typical in a certain context. Full definition
The bargaining there is playing out like a labour law textbook example of how our collective bargaining and industrial conflict laws work. (slaw.ca)
The findings offer an important insight into a classic textbook example of an essential and widely studied process. (sciencedaily.com)
The mere topic of planning something of interest to students allows the long division concept to become more authentic and personalized to them, in contrast to a standard textbook example. (educationworld.com)