Bolded Glossary Words, Caption(s), Chart(s)/Table(s), Diagram(s), Directional Arrow(s), Discussion Questions, Fact box(es), Full color, Glossary, Heading(s)/Subheading(s), Index, Label(s), Map(s), More Resources/Suggestions for Further Reading, On-page definitions of glossary terms, Photograph(s), Pronunciation Guide, Sidebar(s), Table of Contents, Timeline(s), Writing Prompts.