Sunday, September 29, 2013

Fractions, Fractions, Fractions and Freebies

During the past few weeks we have been spending a lot of time on fractions. First I did the butterfly method of adding and subtracting fractions with unlike denominators. So the butterfly method is when you cross-multiply then add and/or subtract the products you get.  And you have to love pinterest because I found a great poster, however I included some examples in my interactive notes:

My only regret on teaching this method is that the student thought this method was the end all, be all for all fraction operations. Such as multiplication. I had to fight the butterfly through some quizzes... Yes this method is great for those students who DO not get the least common multiple concept, however I felt as though they were getting caught up in it when we transitioned to multiplying. Even though I do not know how often we talked about "You just multiply across, look how that works!"

 So then that brings me to multiplication. We started with some concept work building the model then moved into how it worked with the formula. For that I used Teaching with a mountain View for inspiration.  Here is my version of her poster:

She has some great task cards which are inexpensive and visual.  I purchased the multiplying and dividing fractions task cards.  I usually use the task cards as a scavenger hunt and then the students do all of them for extra practice and it gets them out of my hair and out of their seats.  Demonstration:

I then needed a foldable, I learned from last time they needed much of the "notes" done for them so I scaffolded the notes and created this masterpiece you can grab for free off teacherspayteachers:

Note: I purposefully left that last step blank so students can fill in Simplify so they do not forget.

With multiplication we talked about multiplying mixed numbers and for whatever reason this was the biggest hangup.  The three steps were getting lost in translation.  So we broke it down step by step with a game with three dice.  The students rolled three dice for the mixed number and rolled again and multiplied the two mixed numbers together.  I used this directly with my class.  My only suggestion is to do a couple with them.  Even though I did, and left an example on the board there were still a lot of dividing mishaps and converting issues.  Instructions and template you can grab for free off teacherspayteachers:

This week we are talking about division so more to come.

Do you have any fraction go-to activities?

NECAP coming soon.... UGH...

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