Estimating


 * Estimating**

Estimating is a strategy used to obtain an approximate answer. Estimating may be used in mathematics and other subjects when an exact answer is not required. It encourages risk taking by allowing various answers and a margin of error. Estimating promotes discussion, leads to investigation, and involves logical thinking. It is used to check the reasonableness of mathematics work and to assess students’ understanding of mathematical concepts. Estimating has both curriculum and real-life applications.
 * Description**

The teacher:
 * Method**
 * models the thinking process of estimating;
 * encourages shared responses;
 * demonstrates that there is an appropriate time and place for estimation;
 * provides varied opportunities for students to estimate.

Estimating:
 * Considerations**
 * requires practice and support;
 * may be followed by an investigation to determine the exact answer;
 * requires acceptance, by teacher and peers, of a wide range of responses.


 * Illustrations from the Mathematics Classroom**

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 * Elementary**

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 * Secondary**