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Organizer
Curated OER

More Santa's List Sums

For Students 3rd
In this two-digit addition worksheet, 3rd graders add 17 sets of two-digit numbers and write each sum. A 3-part bonus question requires the students to add up all 17 two-digit numbers.
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Worksheet
Curated OER

Polygon Sum Conjecture

For Students 10th
In this geometry worksheet, 10th graders identify the missing angles using the polygons sum conjecture. They measure exterior and interior angles using their angle theorems. There are 63 problems.
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Worksheet
Curated OER

Addition Worksheet #10

For Students 3rd - 5th
In this addition worksheet, students add 3-digit numbers, in groups of three. All problems are written in column form. Students will have to "carry" numbers. There are 16 addition equations on this one-page worksheet. An answer key is...
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Worksheet
Curated OER

Missing Sums and Addends

For Students 3rd - 4th
In this recognizing two-digit addition facts worksheet, students use a number line and addition facts to find the missing sums or addends in problems with and without regrouping. Students solve 20 problems.
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Lesson Plan
Curated OER

Indirect Proof and Inequalities in One Triangle

For Teachers 10th
For this geometry worksheet, 10th graders order the sides and angles of a triangle and determine the range of the third side of a triangle given the lengths of two sides.  The one page worksheet contains sixteen questions.  Answers are...
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Worksheet
Curated OER

What is One Less?

For Students 2nd - 3rd
In this counting learning exercise, students count each group of objects and then count back one to find the new total. Students write number sentences and totals for nine problems.
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Worksheet
Curated OER

Sort to Solve

For Students 2nd - 3rd
In this addition instructional activity, students sort 25 addition facts into 3 categories: doubles, doubles plus 1 or doubles plus 2. Students find each sum.
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Lesson Plan
Curated OER

Estimating Sums and Differences

For Teachers 3rd - 4th
In this math worksheet, learners learn to estimate sums and differences by completing step by step exercises. There is one word problem which is the example, and then students can choose from other estimation activities to do with a...
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Lesson Plan
Curated OER

Representing Numbers Using Scientific Notation

For Teachers 7th - 8th Standards
Learners explore the concept of scientific notation. In this scientific notation lesson, mathematicians discuss how multiplying by a power of 10 affects the decimal. They play Powers of 10 Yahtzee. Students roll a die five times and each...
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Activity
Collaborative Learning Project

Four in a Row Addition and Subtraction

For Teachers 1st - 3rd Standards
Scroll down to find four fun addition and subtraction partner game boards, complete with endless opportunities for practice with numbers 0-38. Kids choose numbers from a number box and, depending on the game, either find the sum or the...
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Worksheet
Curated OER

Completing Number Sentences

For Students 2nd - 3rd
In this number sentences learning exercise, students fill in missing numbers to make given sums correct. An answer key is included; a website reference for additional activities is given.
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Worksheet
Curated OER

Complete Number Sentences

For Students 2nd - 3rd
In this number sentences worksheet, students fill in missing numbers to make sums correct. A website reference for additional activities is given.
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Worksheet
Curated OER

Complete Number Sentences

For Students 3rd - 4th
For this addition worksheet, students solve 14 problems in which the missing addend in an addition problem is filled in. All problems will have a sum of 100.
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Worksheet
Curated OER

Complete Number Sentences

For Students 2nd - 3rd
In this number sentences worksheet, students find the 14 missing numbers in 14 number sentences. Students write their answers in the boxes provided.
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Lesson Plan
Curated OER

www.tutor-usa.com worksheet

For Teachers 6th - 8th
Algebra learners can practice solving one-step equations using both addition and subtraction with decimal numbers.  A few problems challenge the pupil to write and solve their own equation based on information given in a table. 
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Worksheet
K-5 Math Teaching Resources

Adding Mixed Numbers (Unlike Denominators)

For Students 3rd - 6th Standards
Mix things things up in your elementary math class with a series of problem-solving exercises. Presented with a series of mixed number word problems, young mathematicians are asked to solve them by using either visual fraction models or...
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Printables
Houghton Mifflin Harcourt

Unit 2 Math Vocabulary Cards (Grade 3)

For Teachers 3rd
A set of third grade math vocabulary cards include topics that range from addition properties to terms like estimate and fact family. Each sheet has two cards on it. The top half is the word printed in bold text, while the bottom is the...
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Printables
1
1
Houghton Mifflin Harcourt

Unit 1 Math Vocabulary Cards (Grade 5)

For Students 5th Standards
Associative property of addition, exponents, and variables are a few of the terms that a set of flash cards includes and are designed to support math vocabulary instruction. Cards offer a a bold-faced font as well as a thorough...
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Lesson Plan
EngageNY

The Mean as a Balance Point

For Teachers 6th Standards
It's a balancing act! Pupils balance pennies on a ruler to create a physical representation of a dot plot. The scholars then find the distances of the data points from the balance point, the mean.
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Lesson Plan
EngageNY

Similar Triangles in Circle-Secant (or Circle-Secant-Tangent) Diagrams

For Teachers 9th - 12th Standards
First angle measures, now segment lengths. High schoolers first measure segments formed by secants that intersect interior to a circle, secants that intersect exterior to a circle, and a secant and a tangent that intersect exterior to a...
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Printables
1
1
Houghton Mifflin Harcourt

Unit 4 Math Vocabulary Cards (Grade 4)

For Students 4th
Looking for a set of math vocabulary cards for fourth graders? A 14-page packet of vocabulary words includes topics related to multiplication, division, and factor types. Each sheet has two cards on it: the top half has the word in bold...
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Lesson Plan
EngageNY

Divisibility Tests for 3 and 9

For Students 6th Standards
Who knew the sum of a number's digits gives such interesting information? The 18th installment of a 21-part module has scholars investigate division by three and nine. After looking at several examples, they develop divisibility tests...
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Lesson Plan
EngageNY

Unknown Angle Proofs—Proofs of Known Facts

For Teachers 9th - 10th Standards
Lead the class in a Greek history instructional activity with a geometric twist. Pupils relate a short video about geometric properties to modern-day methods of solving for unknown angles. They discuss parallel line theorems and complete...
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Lesson Plan
West Contra Costa Unified School District

Pythagorean Theorem and Its Converse

For Teachers 9th - 12th Standards
Challenge scholars to prove the Pythagorean Theorem geometrically by using a cut-and-paste activity. They then must solve for the missing sides of right triangles.