Comparing fractions visually - easy lesson for 2nd grade
In this lesson, we compare simple fractions by using visual models (pies or rectangles).
In the end, I ask an interesting question about 1/2 of a rectangle cut one way, versus 1/2 of a rectangle cut another way - which will be the bigger piece? Children might not intuitively know that 1/2 of a rectangle will be equal to 1/2 of a rectangle, now matter how it is cut, but I show, using quarters, that the pieces must be equal in size.
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See also
Math Mammoth Grade 2 curriculum