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Surf for More Math

Lesson 5 - Communicate About Estimation Strategies


To encourage students to have fun on the Web while learning about Communicate About Estimation Strategies, here are some games and interactive activities they can do on their own or in pairs.


Explain estimation strategies to determine if a solution is reasonable.

Builds Upon

Student Book pages 258-259


Instructions for Use

The Comparison Estimator provides students with opportunities to practice estimation skills. Students can compare amounts by estimating the number of objects in two boxes.

To use the Comparison Estimator, set the problem type to 'Random'. To answer a question, choose an item from the pull-down menu that best completes the sentence - "greater than," "less than," or "almost the same as." If you choose "almost the same as," the two shapes must be within 5% (either above or below) of the actual answer. Click the 'Check Answer' button to see if it is correct. Try the next question.