How can I change the command \chapter for it not to spell out the word "Chapter"?
For context, I'm writing a textbook (or at least I'm trying), and I would like the command \chapter to spell out "Lesson n" instead of the default "Chapter n", where n is the number of the chapter. Maybe there are other ways to do so that don't involve modifying the \chapter command, but that's what I want to achieve.
Thanks in advance.