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I have the Sonlight home instructor guides for Singapore Math 3A, 3B, & 4A (and will have others once I find them!) They don't have ISBNs, but they're listed on my bookshelf.
PS - I've found the 4B guide, so will be posting it forthwith.
Last Edited on: 5/28/08 9:46 PM ET - Total times edited: 1