Curated OER
Million Dollar Gift
Third graders create a box big enough to hold a million dollars. This is a project fun to do near the winter holidays with inexpensive gifts included in the boxes. This hands-on lesson very effectively demonstrates the concept of volume.
Curated OER
Peekikng At Public Sculpture
Students use the internet to investigate public examples of sculpture. They reflect upon the possibility of being a reference of lifestyles that can exist in a society. A variety of media sources serve as inspiration for the lesson.
Curated OER
Smart Doubling
Second graders use mental math in calculations involving addition and subtraction. They study doubles facts to work out addition problems mentally using part and or whole reasoning.
Curated OER
Rabbits
Students review what they think doubling means and double numbers mentally, for example, 5, 12, 16. They share their solutions and discuss how they doubled. They work together on a problem that is beyond mental working and solve...
Other
Help With Fractions: Subtracting Fractions
The rules for subtracting fractions with like or unlike denominators are clearly explained at this website. Even mixed number subtraction is tackled! This is an excellent place to get step by step explanations for working with fractions.
National Council of Teachers of Mathematics
The Math Forum: "Make One" Operations W Fractions Game
This card game will help students review the basic operations with fractions. The materials needed, the rules of the game, and several follow-up activities are provided here for the teacher as a lesson plan.
Oswego City School District
Regents Exam Prep Center: Adding and Subtracting Fractions
Use this site to learn how to add and subtract algebraic fractions, even if there aren't common denominators. Provides plenty of examples.
McGraw Hill
Glencoe: Self Check Quizzes 2 Add and Subtract Fractions Unlike Denominators
Use Glencoe's Math Course 2 randomly generated self-checking quiz to test your knowledge of adding and subtracting fractions with different denominators. Each question has a "Hint" link to help. Choose the correct answer for each...
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Add and Subtract Fractions
This Math Page tutorial explains how to add and subtract fractions and features a practice section at the very end of the lesson.
Visual Fractions
Visual Fractions: Subtract and Simplify Fractions With Circle Models
Use this interactive site from Visual Fractions to practice subtraction with fractions using circles. You will need to answer the questions with mixed numbers in lowest terms.
Doina Popovici
Math Play: Fractions Jeopardy
Assess your knowledge of adding, subtracting, multiplying, and dividing fractions with a game of jeopardy.
Better Lesson
Better Lesson: Adding and Subtracting Fractions Day 2
How would you add 2 1/2 and 2/3? How would you find the difference between 2 1/2 and 2/3? Students continue to develop strategies for adding and subtracting fractions.
Better Lesson
Better Lesson: Adding and Subtracting Fractions Day 1
If Ashley ate 1/2 pizza, Tatyana ate 1/3 of a pizza, and Tiffany ate 5/8 of a pizza, how much pizza did they eat altogether? What's the smallest number of pizzas they ordered? How much was left? Students work to develop strategies for...
PBS
Pbs: Subtraction of Fractions Using a Visual Model
Use a visual model to subtract fractions with unlike denominators. This video focuses on using an equivalent fractions chart to compare fractions and find the missing piece.
Other
Active Maths Limited: Adding & Subtracting Fractions: Whiteboard Resources
This is an excellent resource to visually illustrate adding and subtracting fractions by finding the lowest common denominator.
Discovery Education
Discovery Education: Webmath: Subtract Two Fractions
Use this "math solver" to subtract two fractions (and/or mixed numbers) that you enter. The site will explain in detail the process of subtacting the fractions you entered.
National Council of Teachers of Mathematics
The Math Forum: Lesson Plans: Fractions
Teachers, this is the place to come for fraction lesson plans if you teach elementary students. All the topics have a number of resources available from which to choose.
Math Medics
S.o.s. Math: Simple Fractions
This S.O.S. tutorial gives students a basic review of simple fractions. Follow the tutorial to refresh your skills involving simple fraction manipulations. Each section contains problems with links to the answers.
McGraw Hill
Glencoe Mathematics: Online Study Tools: Adding and Subtracting Unlike Fractions
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of adding and subtracting unlike fractions.
McGraw Hill
Glencoe Mathematics: Online Study Tools: Adding and Subtracting Like Fractions
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of adding and subtracting like fractions.
AAA Math
Aaa Math: All About Fractions
A comprehensive tutorial that contains the following operations: adding fractions, comparing fractions, converting fractions, multiplying fractions, reducing fractions and subtracting fractions. Explanations, interactive practices and...
Sophia Learning
Sophia: Subtracting Fractions From Mixed Numbers
This lesson examines how to subtract fractions from mixed numbers. A detailed example is included in the video lesson.
Sophia Learning
Sophia: Subtracting Mixed Numbers From Fractions
The lesson investigates how to subtract mixed numbers from fractions. A detailed example is included in the video lesson.
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