Sunday, April 30, 2017

Fractions and fair shares

Students explore problem solving for their introduction to fair shares. There are three students and seventeen cookies. How many cookies does each student get?   Are there any left?  What can we do with it?  

They loved sharing ideas like:  throw the cookies out, give them to the mom, she can decide, give them to who is still hungry.  

We then focused on the fair share aspect.  Students started cutting the cookies.  Many cut them in half, they were convinced this would work.  Partners reasoned through why cutting two cookies in half worked for fair shares and didn't work for fair shares.  Eventually students discovered that they could cut into thirds and each person would get two thirds.      
Students fold paper to represent fractions, explore the number of pieces in the whole and to prove their prior knowledge about fractions as correct or incorrect.