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ReThink Mathematics!
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Successfully Teaching Elementary Mathematics
Successfully Teaching Elementary Mathematics

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8 math TED Talks to blow your mind
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ReThink Mathematics Workshop coming to San Jose on Thursday, February 5th for K-8 Math Educators.  #mathematics #math   #mathchat  
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Don't miss next Wednesday's ReThink Mathematics Workshop in Marin County, CA.   #mathematics   #math   #mathchat  
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It's Problem-Solving Friday! 

Sally's grandfather is 67 yrs old. Sally is 19 years old. 

1. At what age will Sally be exactly one third of her grandfather's age? 2. How old will her grandfather be then? 

Tell us how you got the answer!
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Problem-Solving Friday!

What's it Worth?

Each symbol has a numerical value. The total for the symbols is written at the end of each row and column. Can you find the missing total that should go where the question mark has been put?

Write down your understanding using words and sentences.

This problem is from nrich.maths.org/1053
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