The following aids to vocabulary building are included:
A box or boxes indicating the formation of the new word in each unit.
A word formation chart containing the four common from classes (nouns, verbs, adjectives, and adverbs) for the already introduced words.
A list of the most common Latin, Greek, and English prefixes with examples.
Spelling rules, divided into two sections: general spelling rules that can be applied in most cases and sprecific sprelling rules...