GENKI: An Integrated Course in Elementary Japanese - Teacher's Guide (3rd Edition)

The GENKI Teacher's Guide covers both GENKI Vol. 1 and Vol. 2, with lesson-by-lesson teaching notes for both textbooks. It includes guidance on introducing new material, handling tricky grammar points, and suggestions for supplementary activities.
It comes with the GENKI Answer Key, which includes complete answers for all textbook and workbook exercises, plus workbook listening scripts. For teachers only. If you're self-studying, the standalone Answer Key is all you need.