Principal Sponsors
Makes grants to address the most serious social and environmental problems facing society, where risk capital, responsibly invested, may make a difference over time.
National Science Foundation
An independent federal agency created by Congress in 1950 to promote the progress of science.
King Saud University seeks to become a leader in educational and technological innovation, scientific discovery and creativity through fostering an atmosphere of intellectual inspiration and partnership for the prosperity of society.
The O'Donnell Foundation is devoted to building model programs to enhance the quality of education.
Fractions Intro
Explore fractions while you help yourself to 1/3 of a chocolate cake and wash it down with 1/2 a glass of orange juice! Create your own fractions using fun interactive objects. Match shapes and numbers to earn stars in the fractions games. Challenge yourself on any level you like. Try to collect lots of stars!
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Teaching Resources
Main Topics
- Fractions
- Equivalent Fractions
- Improper Fraction
- Number Line
Sample Learning Goals
- Predict and explain how changing the numerator of a fraction affects the fraction's value
- Predict and explain how changing the denominator of a fraction affects the fraction's value
- Convert between a picture of a fraction, a numeric fraction, and a point on a number line
- Find matching fractions using numbers and pictures
- Make equivalent fractions using different numbers
- Match fractions in different picture patterns
- Compare fractions using numbers and patterns
Tips for Teachers
The teacher's guide (pdf) contains tips created by the PhET team.
Teaching Ideas
You can submit your own ideas and activities.
Related Simulations
Translated Versions:
Software Requirements
| Windows | Macintosh | Linux |
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Microsoft Windows
XP/Vista/7 Sun Java 1.5.0_15 or later |
OS 10.5 or later
Sun Java 1.5.0_19 or later |
Sun Java 1.5.0_15 or later |
Credits
| Design Team | Third-party Libraries | Thanks To |
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