About.com Unit Studies: Articles and ideas for unit studies.
Acorn Academy: Linked unit study directory and collected resources.
Discovery Channel School: Educational resource page with unit studies tied into Discovery channel programming.
GeoDeo Educational Resources: Offers resource books, coloring books, coloring and fun pages books, videos, science and art supplies, teacher’s manual,and games targeted to specific topics.
Home2Teach: Free unit studies.
Homeschool and More: Provides educational products, articles about homeschooling, and a calendar of events.
In the Hands of a Child: Encourages the use of Project Packs to display and review completed unit studies. Sells resources to help you get started.
Johnston Family Enterprises: Unit studies about creation science and music.
Learn How To Speak: Reseller of language programs.
Let's Study Birds!: Multi-sensory thematic study on birds for students 7 to 14.
Links: List of unit study resources.
Peg's Unit Study Planning Page: A detailed how-to on developing your own Unit Studies. Includes checklist and information on learning styles.
Pimsleur Language Programs: Sells products that teach you foreign languages in your home or car.
The Christian Homeschool Journal: Homeschool site with stories of families' experiences and relevant articles.
Unit Study Helps: Message board, FAQs, and a homeschooling newsletter by e-mail.
Unit Study Organization: Homeschooling mother's method of organizing her unit.