We are in the process of adding a new book to the website - Taiwan Today. This is the book that teachers will be using after students have finished book 4 of the current series. However, since this book is different from the current series, there will be some vocabulary that is shared from older books. This may cause some duplicate results in the word bank.
Right now, the new book is classified as book 9 in the system. However, once we have completed adding all its exercises and such, it will be renamed as Taiwan Today.
