Logic of English Morpheme Flash Cards introduce roots, prefixes, and suffixes taught in Essentials. Each set of Morpheme Flash Cards includes the morphemes taught in specific units, or lessons, of Essentials.

Morpheme Flash Cards 1-7, 8-15, 16-22, and 23-30: Any edition of these cards may be used with any Second Edition or later printing of the corresponding Essentials units.

Morpheme Flash Cards Set 1: This set, which we sold from 2015 to mid-2018, included the morphemes for Essentials 1-15 in one large deck. These same morphemes are now printed in two smaller sets, Morpheme Flash Cards 1-7 and Morpheme Flash Cards 8-15. 

If you have Set 1 already, you do not need to purchase new 1-7 and 8-15 cards. However, you will need Morpheme Flash Cards 16-22 and 23-30 when you are ready to begin these units, as they introduce new morphemes from the second half of Essentials that are not included in Morpheme Flash Cards Set 1.