This photocopiable book's 14 units explore the form, meaning, and use of the modal verb system in semantic categories such as Modals of Ability (can, be able to, could) and Modals of Prohibition (mustn't, can't, couldn't). These forms are presented and taught through engaging readings and exercises, many of which take the reader along on journeys to countries around the word, including Brazil, China, Egypt, India, Japan, Mexico, Thailand, Turkey, and many others. The Modal Book is a flexible resource that can be used as a core text for teaching modals or as a supplement from which pertinent individual lessons may be photocopied for specific lesson plans.