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.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.G.A.2
Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the 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 1.0.12
Teacher Tips
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Overview of sim controls, model simplifications, and insights into student thinking ( PDF ). |
Teacher-Submitted Activities
| Games Remote Lesson ideas |
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Trish Loeblein | UG-Intro MS K-5 HS |
Remote HW |
Mathematics Chemistry Physics |
| 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 | MS K-5 |
Discuss Guided |
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 | |
| How do PhET simulations fit in my middle school program? |
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Sarah Borenstein | MS | Other | Earth Science Physics Biology Chemistry |
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| Naming Fractions | Bettie Parker | K-5 | Guided HW Demo Lab Discuss |
Mathematics | ||
| 분수 소개 SIM 사용설명서 | 이화국(Wha Kuk Lee) | MS | Demo HW |
Mathematics | ||
| Fracciones Equivalentes |
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Meaghan Hixson (traducción DianaL) | K-5 | Guided Lab HW |
Mathematics | |
| SECUNDARIA: Alineación PhET con programas de la SEP México (2011 y 2017) |
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Diana López | HS MS |
Other | Mathematics Chemistry Physics Biology |
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| PRIMARIA: Alineación con programas de la SEP México (2011 y 2017) |
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Diana López | MS K-5 |
Discuss Demo Lab Guided HW |
Mathematics Chemistry Physics Astronomy |
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| Le frazioni | simone | MS | Guided | Mathematics | ||
| Explorando as frações | Ana Marta Espindola Marlise Honório de Oliveira Maria Aparecida F. Martinez Viviane Soares da Silva Juçara Aparecida Rosa | K-5 | Lab Other |
Mathematics | ||
| Fração | Elenice Santos, Priscila Flores, Priscila Roemers, Patricia Botelho, Benta Souza | MS | Lab | Mathematics | ||
| Introdução a problemas com frações | Manoel Bento, Alessandra Rodrigues, Elaine Martins, Juliano Flor | K-5 | Lab | Mathematics | ||
| Dándole sentido a las Fracciones usando La simulación de PhET Fracciones: Números Mixtos | Philippe Guegan (Traducción por Mayra Tavares) | MS K-5 |
Guided Discuss |
Mathematics |
Browse legacy activities.
HTML5 sims can run on iPads and Chromebooks, as well as PC, Mac, and Linux systems.
iPad:
iOS 12+ 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, latest version of Firefox, latest version of Google Chrome.
Macintosh Systems:
macOS 10.13+, Safari 13+, latest version of Chrome.
Linux Systems:
Not officially supported. Please contact phethelp@colorado.edu with troubleshooting issues.
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