You can hit the library to get your homeschoolers learning. However you can get them learning the early years too with software. A great program is Advantage Education by Encore . The program by Encore is essential. Check out the series of software at : http://encoreadvantage.com/ . You can check out their product information :
"Advantage™ provides an interactive learning experience and the tools students need to gain learning confidence and improve their grades. Help your child build a solid academic foundation with Elementary Advantage, a complete student resource center that combines lessons, exercises and quizzes with additional learning resources to support and motivate your child in reaching his full academic potential.
With Elementary Advantage, your child will develop knowledge in Math, English, Spelling and Grammar. Additional study aids such as iPod study materials and Encyclopedia Britannica® Student Edition will help support the learning process while brain-building games make studying fun! "
You can also get Math software with a great review . Check out : http://www.encore.com/p-231-math-advantage.aspx . You can check out their series and look for other products for your other homeschoolers.