Language teaching and language learning focus on four skills: Reading comprehension, Aural Comprehension, Writing and Speaking. Most course books authors organize their materials so as to teach these skills in an integrated way.
This seems eminently reasonable, but is it?
Have you ever had a class wanting/needing to improve conversational skills on the post-intermediate level and chosen an integrated skills course book for them – only to find yourself getting bogged down in long texts for pre-discussion work? Have you ever had a class wanting/needing to improve writing skills on the pre-intermediate level and chosen an integrated skills course book for them – only to find yourself tied up with audio materials to present the topics? The reason for this is that the underlying assumption of the integrated skills approach to language learning: That all four of the learners’ skills are equal to each other at the beginning of a course and they progress at the same pace during a course.