Fractions: Intro
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Topics
- Fractions
- Equivalent Fractions
- Improper Fraction
- Number Line
Description
Explore fractions while you help yourself to 1/3 of a chocolate cake and wash it down with 1/2 a glass of water! Create your own fractions using fun interactive objects. Match shapes and numbers to earn stars in the fractions game. Challenge yourself on any level you like. Try to collect lots of stars!
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
- Build matching fractions using numbers and pictures
- Compare fractions using numbers and patterns
Standards Alignment
Common Core - Math
1.G.A.3
Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.
2.G.A.2
Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.
2.G.A.3
Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape.
3.NF.A.1
Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.
3.NF.A.2
Understand a fraction as a number on the number line; represent fractions on a number line diagram.
3.NF.A.2a
Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line.
3.NF.A.2b
Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.
Version 1.0.1
Teacher Tips
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Overview of sim controls, model simplifications, and insights into student thinking ( PDF ). |
Teacher-Submitted Activities
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Authors | Level | Type | Subject |
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| What is a Fraction? |
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Anonymous | K-5 | Other | Mathematics |
| Comparing and Ordering Fractins Day 2 of 3 |
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Meaghan Hixson | K-5 | Guided | Mathematics | |
| What is a Fraction? Day 1 of 3 |
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Meaghan Hixson | K-5 | Guided | Mathematics | |
| Building Fraction Sense Using “Fractions Intro PhET Simulation” |
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Philippe Guegan | K-5 MS |
Guided Discuss |
Mathematics | |
| Equivalent Fractions Day 3 of 3 |
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Meaghan Hixson | K-5 | Guided | Mathematics | |
| Fractions 3 Day Unit |
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Meaghan Hixson | K-5 | Guided | Mathematics | |
| Alignment of PhET sims with NGSS |
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Trish Loeblein | HS | Other | Biology Chemistry Earth Science Physics |
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| How do PhET simulations fit in my middle school program? |
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Sarah Borenstein | MS | Other | Chemistry Biology Earth Science Physics |
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| 분수 소개 SIM 사용설명서 | 이화국(Wha Kuk Lee) | MS | HW Demo |
Mathematics |
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The new HTML5 sims can run on iPads and Chromebooks, as well as PC, Mac, and Linux systems.
iPad:
iOS 11+ Safari
iPad compatible sims
Android:
Not officially supported. If you are using the HTML5 sims on Android, we recommend using the latest version of Google Chrome.
Chromebook:
Latest version of Google Chrome
The HTML5 and Flash PhET sims are supported on all Chromebooks.
Chromebook compatible sims
Windows Systems:
Microsoft Edge and Internet Explorer 11, latest version of Firefox, latest version of Google Chrome.
Macintosh Systems:
macOS 10.9.5+, Safari 9+, latest version of Firefox, latest version of Chrome.
Linux Systems:
Not officially supported. Please contact phethelp@colorado.edu with troubleshooting issues.
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