Already have a TD account?

If you are already a Teachers' Domain user, sign in now to connect your Teachers' Domain and accounts.

Teachers' Domain sign-in name:

Organization:

Password:

Signing in now will connect your and Teachers' Domain accounts, so that in the future you will automatically be signed into Teachers' Domain when you come from .

Not yet registered?

First time here?

As a user, you may browse Teachers' Domain and view as many resources as you wish without registering.

However, for access to all fo the features of Teachers' Domain, we'll need a little more information. Learn More

You are now "Test Driving" Teachers' Domain

You may view up to 7 resources in this limited trial period.

You have 6 views remaining. Register now for unlimited free access and to download, share, and save resources. Learn More

You are now "Test Driving" Teachers' Domain

As a user, you may view as many resources as you like without registering.

About Registration:

Registering with Teachers' Domain is free and allows you to:

• View as many resources as you like
• Save, sort, and share resources using My Folders and My Groups
• Download resources to your desktop
• See standards correlations for your state

Thank you for "Test Driving" Teachers' Domain

You have viewed all seven resources permitted in this limited trial period. You may continue to browse the site, but to view, download, share, and save resources, you must register now. Registration is simple, safe, and free.

For more information:

Learn about our online Professional Development Courses, or review our Privacy Policy.

If you still have questions, please contact us.

Recommended for: Grades 4-7

Resource: When Does 50-50 Become 50-50?

Save to a folder

Media Type:
QuickTime Video

Length: 3m 24s
Size: 9.7 MB

In this video segment from Cyberchase, Bianca wants to see a movie but she can’t decide which of the two movies she should see. To help her decide, she flips a coin. The coin comes up “heads” three times in a row. This surprises Bianca, so she does some research to find out the probability of landing on heads or tails when flipping a coin.

Alternate Media Available:

Transcript (Rich Text Format Document)

View Citation

Teachers' Domain, When Does 50-50 Become 50-50?, published October 8, 2008, retrieved on ,
http://www.teachersdomain.org/resource/vtl07.math.data.col.whendoes50/

Frame and Focus
Follow Up
Connections
Standards

Printer Friendly Version of Frame and Focus

Print Frame and Focus

Here are some Frame, Focus and Follow-up suggestions for using this video in a math lesson.

What is Frame, Focus and Follow-up?

Frame: If you roll a pair of dice and add them together, you might get a sum of “2” on your first roll. Does that mean that “2” is the most likely sum to come up? Why or why not? How many times do you think you would have to roll the dice to get some accurate data about which sum comes up the most?

Focus: Bianca does some research on what a “50-50 chance” means when flipping a coin. What does she find out? After she reads that she must make “many” coin flips, what does she do? How many coin flips does she perform in order to get more accurate results?