These four books are not meant to supplement the coursebook as there are quite a few similarities that would question the validity of buying both coursebook & the four skills books.

I really would like to use these four books as they give you the freedom to pick & choose, catering to needs & interests, with the bits that you don't cover being completed as self study - as the blurb says - a learner-centred approach. And beginning this approach with intermediate learners might help with developing more independent learners in the long run. You also have the choice of bringing in other materials at the same time.

As self-study materials, they are self explanatory & learner friendly. The four books are ideal to recommend when using a lopsided coursebook or a student asking you for supplementary material.

As the four books do not come with a teacher's book, possibly the less experienced teacher may well prefer the 'Just Right' coursebook previously reviewed. A drawback of this approach would come in systematising work covered in an institution, one central coursebook making this task easier. These books would be ideal when working with 1-1 classes & it would also appeal to the more mature class such as the corporate-based class.

To sum up, this is certainly one of the ways forward in the provision of course materials. Definitely worth checking out.