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Activity
Curated OER

Finding Common Denominators to Subtract

For Teachers 5th Standards
Subtracting fractions with unlike denominators can be overwhelming, but in this task, 5th graders work systematically to break down the procedure through three questions. The first two questions ask for pictures to be drawn along with...
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Worksheet
T. Smith Publishing

St. Patrick's Day Subtraction Worksheet 1

For Students K - 2nd Standards
You are in luck! On this St. Patrick's Day-themed worksheet, little leprechauns compute the answers to 20 one-digit subtraction problems and write the answers in the shamrocks. They may also wish to color the shamrocks. An answer key is...
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Assessment
Illustrative Mathematics

Sum and Difference Angle Formulas

For Students 9th - 12th Standards
Need practice deriving trigonometric angle formulas? With this worksheet, pupils derive the sum and difference formulas for cosine and tangent and the difference formula for sine. Scholars use the sine sum formula and other known...
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Lesson Plan
Curated OER

Primary Understanding and Use of Place Value

For Teachers 3rd - 4th
Explore place value and regrouping with your class. They develop awareness of several ancient number systems and how they differ from the base ten system commonly used today. They play "Chip Trading" with partners to practice addition...
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Lesson Plan
1
1
US Institute of Peace

Making a Difference: Becoming a Peacebuilder

For Teachers 6th - 8th
Being an agent of change is no easy task! What are some of the common challenges that peacebuilders face every day? The 14th portion in a series of 15 explores the lives of peacebuilders. Grouped pupils discuss these challenges before...
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Lesson Plan
Curated OER

Particles: Size Makes All the Difference

For Teachers 9th - 12th
High schoolers plot particle sizes of common airborne materials on a log scale. They read an article on particle size and its relationship to the ability to pass through the lungs, into the bloodstream, and eventually into the cells of...
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Lesson Plan
EngageNY

One-Step Equations—Addition and Subtraction

For Teachers 6th Standards
Just one step is all you need to find success in solving equations. The 27th installment in a series of 36 teaches how to solve one-step equations involving addition and subtraction. Tape diagrams help future mathematicians in this task.
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Worksheet
Curated OER

Fraction Fun

For Students 3rd - 4th
Learners solve 22 problems in which simple fractions with like denominators are added, subtracted and compared. Good practice for your third and fourth graders!
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Worksheet
Math Drills

Adding and Subtracting Mixed Fractions (B)

For Students 4th - 6th Standards
Grab your stopwatch...ready, set, go! Time youngsters as they solve the addition and subtraction of mixed fractions. There are 12 problems provided, all of which have common denominators. An excellent practice!
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Printables
Curriculum Corner

"I Can" Common Core! 1st Grade Reading

For Teachers 1st Standards
This series of printable I can statements breaks down first grade Common Core reading standards into child-friendly terms. A great resource for providing clear learning objectives for young readers.
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Worksheet
Curated OER

Adding and Subtracting Fractions (B)

For Students 3rd - 5th
In this adding and subtracting fractions worksheet, students find the sums and differences of fractions with common denominators. Students solve 10 problems.
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Worksheet
Curated OER

Fraction Subtraction

For Students 5th - 8th
In this fraction subtraction with common denominators learning exercise, learners problem solve and calculate the answers to thirty subtraction equations.
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Worksheet
Curated OER

2 Digit Subtraction Worksheets with Regrouping

For Students 2nd - 3rd
In these subtraction worksheets, learners will subtract single and double digit subtrahends from double digit minuends. Students will need to regroup to solve.
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Worksheet
Curated OER

Difference In Time

For Students 2nd - 3rd
In this time worksheet, students write down the time and compare the difference in time between the two clock faces. Students complete 6 time problems.
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Worksheet
Curated OER

Factoring the Difference of Two Perfect Squares

For Students 9th - 11th
In this Algebra I/Algebra II worksheet, students factor the difference of two perfect squares.  The one page worksheet contains five multiple choice questions.  Answers are included. 
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Worksheet
Curated OER

Subtract Fractions With Like Denominators (D)

For Students 3rd - 4th
In this fractions worksheet, students solve 21 problems in which simple fractions with like denominators are subtracted. An example is provided with hints.
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Lesson Plan
1
1
Shmoop

ELA.CCSS.ELA-Literacy.RL.11-12.6

For Teachers 11th - 12th Standards
It ‘s assessment check list time, and you have nothing to prove that your learners mastered the skill RL.11-12.6. Rest assured, here is a plan that is sure to appease your administrator. It offers solid examples on the difference between...
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Activity
Shmoop

ELA.CCSS.ELA-Literacy.L.11-12.6

For Teachers 11th - 12th Standards
Here's an exercise designed for the Common Core Literacy Standard L.11-12.6 that asks learners to demonstrate their ability to put together all they have learned about language. The first activity is based on a passage from Rosencrantz...
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Activity
Shmoop

ELA.CCSS.ELA-Literacy.RI.11-12.1

For Teachers 11th - 12th Standards
Your students have mastered using textual evidence in literature, but what about using this skill in informational texts.  Uh oh! That is right—they are not the same thing. Darn the Common Core! See options on how to differentiate...
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Lesson Plan
1
1
EngageNY

Adding and Subtracting Rational Expressions

For Students 10th - 12th Standards
There's a fine line between a numerator and a denominator! Learners find common denominators in order to add and subtract rational expressions. Examples include addition, subtraction, and complex fractions.
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Lesson Plan
EngageNY

The Power of Algebra—Finding Pythagorean Triples

For Students 10th - 12th Standards
The Pythagorean Theorem makes an appearance yet again in this lesson on polynomial identities. Learners prove a method for finding Pythagorean triples by applying the difference of squares identity. 
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Assessment
Illustrative Mathematics

Sharing Markers

For Students 1st Standards
Let your first graders translate these word problems into subtraction sentences. Some of the equations involve finding the answer after Char gives some of her markers away, while others require finding the amount of markers Char started...
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Assessment
Illustrative Mathematics

Boys and Girls, Variation 1

For Students 1st Standards
Given a certain amount of boys and certain amount of girls, how many children are there total in the class? Assess learners' ability to use addition and subtraction strategies when solving word problems.
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Assessment
Bridges In Mathematics

Grade 2 Comprehensive Growth Assessment

For Teachers 2nd Standards
Need to know if your students comprehend all the Common Core standards covered in second grade? This growth assessment will let you know.  Find out if your second graders can add/subtract, tell the time, read a bar graph, know their...