*Visual Fractions: An On-Line Fraction Tutorial: http://www.visualfractions.com/

Ask Dr. Math: http://mathforum.org/library/drmath/sets/elem_fractions.html

All About Fractions: http://www.aaamath.com/fra.html

Compare Fractions: http://www.visualfractions.com/Compare.html

FUNBRAIN- Fresh Baked Fractions: http://www.funbrain.com/fract/

Math Pattern Blocks:  http://math.rice.edu/~lanius/Patterns/

Math League: http://www.mathleague.com/help/fractions/fractions.htm