The overview and the examples helped me. The most important parts were:
Nouns - name a person, place, thing, or idea
Pronouns - take a noun's place
Adjectives - describe a noun or pronoun
Verbs - describe an action or a state
Adverbs - describe a verb, adjective, or adverb, add more information
Articles - introduce nouns
"conjunctions are used to connect words, phrases, or sentences"
"prepositions show a relationship of place, time, or location"
"An interjection is an expression of emotion"