GED (General Educational Development) testing in the state of Ohio is handled by the Ohio Department of Education. The state is continuing its partnership with GED Testing Service and, as of January 1, 2014, offers the new 2014 computer-based GED test.
The Ohio site is very friendly, with lots of common How Do I? questions shown at the top with links to the answers.
Good luck! Come back and share your experience with others: Which Part of the GED Test Is Easiest/Hardest?