Definition: A coursebook, a formal manual of instruction in a specific subject, especially one for use in schools or colleges.
Alright class, settle down and let’s take a peek, At what “textbook” really means, if you please seek! The dictionary's right, it gives us the key, A "coursebook" is part of what we see. It's more than just paper, bound tight and neat, A formal manual – a learning treat! Think of it as guidance, clear and bright, To help you master knowledge with all your might. Especially for schools and colleges too, It teaches subjects, shiny and new! So ‘textbook’ means something to study and know, A structured guide, helping wisdom grow! Do you have any questions? Let's discuss it with glee, Now who can tell me what a textbook might be?