[Bagga]

Though I think I prefer Headway to most of the coursebook series I have used, I have found English File interesting recently. Although I think that is partly caused by over familiarity with Headway.

However, I have never restricted myself to just using the coursebook, as I have never been wholly satisfied with them. I prefer to use the coursebook as a curriculum, and as a basis for the course, and then I add activities tailored to the needs of the class and my whims of the moment. (I believe that teacher boredom is a very counter-productive factor.)

I find that I keep returning to the old favourites that I have relied on for the last 15 years. These include:

Almost anything by Penny Ur, but especially Grammar Practice Activities
Jill Hadfield's Communication Games series, esp the Intermediate book
Peter Watcyn-Jones's Vocabulary Games and Activities & Grammar Games and Activities
Several different song lyrics sites on the internet

The OP says that many different coursebooks are available locally. This suggests to me that EFL has been running in that area for some time. I have often found that students in areas with a long (ish) history of EFL teaching locally have already "learned" the grammar, or at least had it taught to them. Or AT them....

In such circumstances they need interesting and stimulating practice, and straying from the coursebook has beneficial results. Especially when every different level in a coursebook series has an identical structure - a perhaps inevitable failing in a coursebook series.

However, always try to prepare different activities for the same teaching point, from different resource books. You can then choose the one that seems most appropriate at the time, and you avoid a situation I experienced in my early years in Poland. I took a book from my bag and said proudly "I found this book in the school library and it contains lots of interesting things for us to do".

One student groaned and named one activity I had intended to do that evening, and even gave the page number. I asked how she knew so much detail, and she told me that she had done that same discussion activity every year for the last 4 years. I quietly decided to shelve my plans do do that very activity during that lesson, and got the class to check the contents page and choose which activity titles they liked the look of.

(Don't forget, the most under-used but perhaps the richest resource in an EFL class is the students themselves. If you can get them using English in relation to their own area of expertise, their own lives, then you are home free.)