Here are some pictures of an activity we did using pattern blocks.
The Assignment:
Build a triangle that is 1/3 green and 2/3 red.
Build a triangle that is 2/3 red, 1/9 green and 2/9 blue.
Build a parallelogram that is 3/4 blue and 1/4 green.
Build a parallelogram that is 2/3 blue and 1/3 green.
Build a trapezoid that is 1/2 red and 1/2 blue.
Build a triangle that is 1/3 green and 2/3 red.
Build a triangle that is 2/3 red, 1/9 green and 2/9 blue.
Build a parallelogram that is 3/4 blue and 1/4 green.
Build a parallelogram that is 2/3 blue and 1/3 green.
Build a trapezoid that is 1/2 red and 1/2 blue.
The students were put into groups and they had to figure out which pattern blocks to use given the following fractions (which was pretty tricky). Once they found the correct blocks, they had to make an assigned shape. They are so competitive and everyone wanted to find the answer first! This could be because the first to have the correct answer got to go to the overhead and share their findings with the class. Lot's of thinkers in this group ;)
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