For the Grade 5 and Grade 6 books, keeping the old threads and updating them might be a valid option. There are only minor additions to the content in the new books. People can just look at the post date and know whether it is specific to the new books and artwork or not.

For the Grade 3 and Grade 4 books, I don't think keeping the old threads open is the best way to do it. The old lessons often merged disparate vocabulary sets into a single chapter, although they usually had one grammar focus each. The new textbooks in use by different schools might not use the same vocabulary with each lesson, and some teach slightly different grammar. (Is everyone learning "have" with school supplies? Days of the week with school subjects? I don't know how homogeneous the new books are, as I only have access to 천재교육.)

Whether we keep the same threads for G3&4 or not, I think we need a sticky post listing the topics/grammar/vocabulary and which threads to find them in (with links), so people can find the posts they need. 

Yeah, pretty much what ucla said. I'd vote for keeping the 5th and 6th grade threads, and creating new ones per book for 3rd and 4th, with the first post set aside for links to similar unit threads in the other books and previous books. Solves the problem of similar target expressions but different vocab whilst still providing convenient ways to dig up alternate resources.

Here's what I'll do:

1. Use this thread to figure out what 3rd and 4th grade books are out there. 

2. Create new threads for each 3rd and 4th grade book and link them to each other, and the index.

3. Add 2011 to 3rd, 4th, 5th, and 6th grade thread titles.  Also, write an explanation in the index of why the lesson titles may be different from the 5th and 6th grade thread titles.


Let me know if you have anything to add or change..or a better idea of how to organize these threads.