Use highest order value (such as tens or hundreds digit) to make simple estimates 0306.2.5

Links verified on 12/23/2014

1. Countdown Activity: Using 'Counting on Frank" - video lesson
2. Estimate Starter Lesson - interactive game
3. Home Run Derby Math - you don't have time to add, just estimate the correct answer [ addition, subtraction, or multiplication ]
4. What a Crowd! - practice estimation skills at Math Cats - Click on the "go" button, and you'll see a crowd, anywhere from 15 up to 2,000 tiny people! Soon, a box will pop up to ask you how many people are in the crowd. After you guess, you'll find out the actual number. [works best in Internet Explorer]

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