From the Manufacturer
Meet Biff, your guide to learning all about measurement and the units used to measure things. Check out the lessons - there are three different levels, each packed with information. And the games and quizzes are designed with learning in mind. If you're stumped, don't worry! Biff is always around to provide help.
Length & distance
Area & volume
History & facts
Windows 98 / Windows ME / Windows 2000 / Windows XP / Windows Vista / Windows 7