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Find large scale street plans produced by the Sanborn Fire Insurance company from 1867 to 1970. Locate and identify buildings and neighborhoods. Study the growth of towns and cities, and the impact of new development.

Contains full text for hundreds of science encyclopedias, reference books, periodicals and other sources.

Offers exclusive full text for many top consumer small business reference books, as well as tools to address many small business topics. Includes business videos, a help and advice section and details on how to create business plans.

An excellent way to get a quick authoritative and accessible overview of a subject.

Whether wandering through the woods or the neighborhood, users can use What Tree Is It? to identify their surrounding trees by leaf or fruit. Learn more by exploring trees by name.

For both budding naturalists and inadvertent encounters, What's That Snake? will help anyone identify an Ohio snake in a few simple steps. Learn more by exploring Snakes by Name, a Snake FAQ, the Glossary, or Further Reading suggestions.

By answering just a few questions, flint artifacts of Ohio can be identified as a blade, drill, point, or scraper and attributed to a likely era and people. Learn more by exploring the Glossary, Artifacts Index, or articles about Ohio's Prehistoric People.

Ages 6-10. This go-to resource is chock-full of fun activities, hands-on science projects, and age-appropriate articles, and offers image-based navigation to help young learners find information quickly and develop necessary digital literacy skills.

Ages 14 and up. A wealth of vetted articles supplemented by thousands of original source documents fosters advanced research and critical thinking skills and prepares students for continued growth!

Ages 10-14. Tailored specifically for students, articles include multimedia and related resources to engage students, biographies, and supplemental tools to support cross-curricular studies.