Any Essentials 16-22 Teacher's Guide may be used with any Essentials 16-22 Student Workbook. This product was released in 2018 as part of the major expansion of Essentials in the 2nd Edition, and there have been no content changes since then.
However, note that books from the 1st Edition of Essentials (published in 2012), which had 40 Essentials lessons in one volume, are not compatible with newer versions.
Edition History: Essentials 16-22 Teacher's Guide
2nd Edition: Essentials Teacher's Guide, Lessons 16-22. Published in 2018. 364 pages. The third quarter of Essentials (Lessons 16-22). Essentials is now printed in four volumes for manageability and more flexibility in pacing.
Compatible with any 2nd Edition or later workbook for Lessons 16-22.
Not compatible with the Essentials Cursive or Manuscript Workbook, 1st Edition (2012).
1st Edition: Essentials Teacher's Manual: Published in 2012. 612 pages. All of Essentials (40 lessons) in one book. Single level of application in each lesson.
Compatible only with the Essentials Cursive and Manuscript Workbooks, 1st Edition (2012).
Other 3rd Edition Details
There is a slight shift in the page numbering of this Teacher's Guide starting with the second printing (released in early 2019). We slightly reorganized and expanded the introduction to match the rest of the Essentials teacher's guides. The introduction is now two pages longer, so all lesson content is shifted two pages later. The lesson content has not changed, and workbook compatibility is not affected.
Note about Grammar Flash Card Compatibility
We recommend using a 3rd Edition set of the Grammar Flash Cards with 2015 and later Essentials Teacher's Guides, particularly for Lessons 16-22 and 23-30.
There was a major update and expansion of the Grammar Flash Cards in 2018 when we added a number of new grammar concepts to Essentials, mostly in Lessons 16-30, and clarified our instruction about some previously taught concepts, so some of the grammar concepts taught in the 16-22 Teacher's Guide are not included in the 1st and 2nd Editions of the Grammar Flash Cards.