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Activity: Estimating the Size of Fractions by Using Benchmarks   [PDF]
Go to: http://mathforum.org/.../4-1_estimating_fractions_illuminations_activity.pdf   [PDF] (opens a new window)
Description: This activity helps students to understand when to round fractions to 0, 1/2 or 1. By sliding a lever, students create visual models to represent fractions. Students decide whether the fractions are closest in size to 0, 1/2, or 1. Students then look for patterns and come up with a rule of rounding fractions to benchmark values of 0, 1/2 or 1. Extension problems involving mixed numbers follow the interactive exploration.
Technology Type: JavaScript 
Author: Victoria Miles
Language: English 
Cost: Does not require payment for use

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