Wednesday, April 15, 2009

Fractions


This week I pulled out several board games we have that use fractions. As we looked at them, we discussed what fractions actually are. Students often say they do not know what fractions are. Yet if you ask them to give you half of something they can do it. The gap is between the abstract idea of fractions and their experiential understanding of the world. So part of what we work on is bridging that gap, using manipulatives and talking about what they represent.

Today we used frog counters in two colors to represent fractional parts of groups of objects. If you have 6 frogs and half of them are red, what does that look like? Students made groupings that fit the fraction given and worked on writing the fraction. Can you show what it looks like if one third of them are a given color? Is there another fraction name that would represent the same amount? Some quickly came to 2/6, while others got help from a partner to figure it out.

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