In Grade 7, students refine and master previously learned knowledge and skills in increasingly complex presentations, reading selections, and written compositions. Seventh grade students analyze a speaker's persuasive techniques and credibility. Students evaluate a spoken message in terms of its content, credibility, and delivery. Seventh grade students continue to read widely in classic and contemporary selections and informational texts. Students use knowledge of Greek and Latin roots and prefixes and suffixes in reading. Students recognize how style, tone, and mood contribute to the effect of the text. Seventh grade students are able to select and use different forms of writing for specific purposes such as to inform, persuade, or entertain. Students vary sentence structure and use verb tenses appropriately and consistently such as present, past, future, perfect, and progressive. Seventh grade students edit their writing based on their knowledge of grammar and usage, spelling, punctuation, and other conventions of written language. Students produce final, error-free pieces of written composition on a regular basis. Seventh grade students draw data from multiple primary and secondary sources for use in research reports and projects.