Floating sets..What do we do with them?

The term 'floating sets' must be a Malaysian invention, The term is so commonly used in schools to refer to the forty-odd set of model test papers or workbook that teachers use in the classroom. I checked the term over the internet but failed to find the same term. A teacher never stops learning and this applies to me too despite the fact that I've been teaching for twenty-four years. What is the meaning of the figure 24 if I have not added new values to my teaching methods and approaches? I may be repeating the same mistakes for the past twenty-four years! I have been quietly admiring one teacher's style or approach in teaching a language. She brings the floating sets and gets students to attempt various exercises from the book. Genius! I thought. This saves a lot of time  photocopying (which I do every week). I quickly did a mental audit of the pros and cons and came up with the following:

PROS	CONS
·      saves time photocopying ·      ss know what to do automatically ·      saves money ·      excellent for drills of grammar items ·      practical	·      ss can copy answers at the back (if key is not removed) ·      teaching is monotonous ·                                 materials tend to be exam-based ·      copying takes a lot of ss time ·      storage

Maybe I should take this up seriously. To be honest I hardly use 'floating sets' in the class. Probably it's time for a change..