We usually start out our math class with a real life, open ended activity and work in groups of 2-3 to figure out how to tackle the problem. We have recently been learning how to make reasonable estimations and have had fun going through the book Great Estimations by Bruce Goldstone. (Thank you, Ms Becky--our librarian, for pointing out this book to us!) Using the strategies shown in the book, we are becoming more and more accurate in our estimations.
The task set before us on one day was to estimate how many elbow macaroni noodles come in a packaged box of macaroni and cheese. The students were to:
1. Make a "wild" guess.
2. Make an "educated" guess (using the strategies shown in the book.)
3. Figure out the exact answer (if time--but so far the process has been more fun than finding the exact answer!)
As we worked together, I recorded all the mathematical thinking I was hearing.
I was impressed by what I heard:
- the incorporation of proper math terms
- using addition and subtraction in context
- asking for tools around the classroom that would be helpful
- asking each other questions and listening to the answers
- logical strategies and explanations
- collaboration terms
- thinking out loud
- comparing and contrasting with other groups
- politeness
- "light bulb" moments
The results haven't always the same but sometimes the process is just as important.
Ms Becky, does our library have this book, too?
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