Schoolhouse Rock! Grammar Rock Learn the Building Blocks of Language to Inspire Writing Confidence Gain confidence in writing and speaking; Understand sentence structure Learn to use the parts of speech: nouns, pronouns, adverbs, adjectives, verbs, prepositions 19 engaging activities that reinforce the lessons in the videos Build Writing Skills. Mac OS 7.1 - 9.2 / OS X Classic mode, Windows 95/98/Me/XP