interactive fractions
a1 a2 a3 a4
b1 b2 b3 b4
c1 c2 c3 c4
d1 d2 d3 d4
what fractions look like types of fractions operations 

Is two thirds bigger than three fifths?


This is what two-thirds and three-fifths look like. Drag some points and decide which fraction is bigger.