Rational Numbers
http://mathworld.wolfram.com/RationalNumber.html
Teaching module on rational numbers for prospective teachers.
http://jwilson.coe.uga.edu/Texts.Folder/Tirosh/Module.html
Rational Numbers
http://mathworld.wolfram.com/RationalNumber.html
Teaching module on rational numbers for prospective teachers.
http://jwilson.coe.uga.edu/Texts.Folder/Tirosh/Module.html