Hey Lever,
My school is neither big nor well off, in fact we're quite poor~! I believe the CDs and books were sent out as packages, but they may have been sent from the district offices, in which case it'd be up to them. I'm in 강서구 Gangseo District.
I'm really disappointed so many people chose the pretty YBM books, I figured a lot of people would be won over by their design and I'm surprised that people have chosen the the orange 천재교육 book which is filled with masses of complicated activities requiring lengthy Korean explanations. I believe but cannot remember, that the CD for this one was particularly awful with lots of spoken Korean.
Anybody who has tried to learn a second language will agree that hearing your native tongue during language learning lessons is the fastest way to switch your brain back into your native language. Written native tongue does not affect the brain in the same way spoken speech does.
Of the CDs, the standout by far is the Green 천재교육 (윤). I've since switched my lessons to using a combination of the current textbook and the Green 천재교육 (윤). Without asking them, the students have been telling me after class 'teacher, today very good.' I have used 5th and 6th grade versions of this book in class, the songs are easy to follow and well received. The dances are interesting for physical learners and also easy to follow, review games are good and there is NO SPOKEN KOREAN on the CD. (except for lesson selection page) I've also used the Reading and Story Time (roleplay) sections and they have been very well received.
Someone complained that the Green 천재교육 (윤) doesn't use contractions, it says "It is mine" "They are not" instead of 'It's" and "They're not" but this isn't a bad thing. Have your high level students answer questions with the contracted forms and be happy that your lower level students will have an easier time understanding the text.
As far as textbooks go, the Daegyo (대교) text has a few useful resources but the CD is one of the worst.
As far as REJECTED TEXTBOOKS go... KEEP THEM!!!!!
I've hoarded all of the textbooks and have them on the shelves as additional resources. Keep the CDs too and switch it up. Most have similar chapters and if you don't like an activity, switch it out with photocopies.
In response to the comment on Green 천재교육 (윤) being 7 lessons, if your students need to move faster, just speed it up! It's not that hard. Teach L1, 2, 3+4, 5, 6+7, whatever is appropriate for your kids, but use the best resources! Sheesh!