If you read out the book in class, that might be fine. If you recorded the class and uploaded it to youtube, that would be public broadcast and a copyright viol

If you read out the book in class, that might be fine. If you recorded the class and uploaded it to youtube, that would be public broadcast and a copyright violation. If your students with eidetic memory quoted parts in public, that would be fair use. If your students recited the entire thing in public, that would probably be public broadcast and a copyright violation (for a court to decide). If you made copies of the book and gave them to your students, it would be a copyright violation and you would also lose your job (schools have pretty strict rules about how much copyrighted work can be included in course notes, because they have and will be sued beyond fair use or legal exceptions for educational institutions).