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Worksheet
Curated OER

Fourth of July Addition and Subtraction

For Students 2nd - 3rd
What is Thomas Jefferson signing? Focus on American history with this cross-curricular math puzzle. Learners utilize addition and subtraction skills to solve the mystery of the Fourth of July. All numbers are 3-digit, and there are no...
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Worksheet
Curated OER

Secret Code Riddles: Addition & Subtraction

For Students 4th - 6th
In this riddle worksheet, learners use mathematics to break a secret code. They solve addition and subtraction problems to discover the answer to given riddles. There are 9 riddles, with an average of seven to nine problems to solve...
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Lesson Plan
Curated OER

Codebreaker Math

For Teachers 2nd - 3rd
Students solve addition and subtraction problems and decipher and write messages using a code. They read and discuss an informational fact sheet about the Navajo code talkers from World War II, and decode and re-code messages using math...
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Lesson Plan
For the Teachers

$1 Math

For Teachers 2nd - 7th Standards
Captivate your class by having them find the value of their names, different zoo animals, musical instruments, etc.,with a mental math lesson plan. Using the coding formula listed, children learn to fluently estimate and calculate simple...
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Interactive
CK-12 Foundation

Addition and Multiplication Properties with Real Numbers: The Secret of Subtraction

For Students 6th - 8th Standards
An interactive boosts mathematicians' knowledge of subtracting integers using a horizontal number line by way of multiple-choice, true or false, and discussion questions. 
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Lesson Plan
Curated OER

A Secret Code

For Teachers 2nd - 3rd
In this addition and subtraction worksheet, students solve for problems to complete the riddle about George Washington.  Students solve 20 two digit problems of addition and subtraction with some regrouping necessary.
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Worksheet
Curated OER

Integer Computation

For Students 5th
In this integer computation learning exercise, 5th graders solve and complete 14 different problems that include solving various types of integers. First, they use the code in the columns to solve the 3 puzzles at the bottom of the...
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Worksheet
Curated OER

Boat Safety Math

For Students 1st - 2nd
What should you always carry on a boat? Learners must solve ten addition and subtraction problems to solve this riddle. The equations include single and double-digit numbers, but no negative numbers are used. They also don't need to...
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Lesson Plan
Curated OER

ZIP Code Math

For Teachers K - 12th
Students add or subtract to solve ZIP Code Math word problems. A ZIP Code Math work sheet is included. This lesson combines math with geography quite nicely.
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App
Little 10 Robot

Operation Math Code Squad

For Students 2nd - 6th Standards
Your mission, if you decide to accept it, is math skills practice. In this app, Mission Impossible meets basic number operation skills, and your students are the secret agents. 
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Unit Plan
Curated OER

Deciphering Word Problems in Order to Write Equations

For Teachers 5th - 8th Standards
Help young mathematicians crack the code of word problems with this three-lesson series on problem solving. Walking students step-by-step through the process of identifying key information, creating algebraic equations, and finally...
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Lesson Plan
Curated OER

Domain: Operations and Algebraic Thinking

For Teachers K - 2nd
Practice basic operations for young mathematicians in fun ways! Using two decks of cards (Ace through 10 plus the joker), learners play "memory" by matching numbers that can be added to make 10 and writing number sentences. In another...
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Worksheet
Curated OER

Fourth of July Add or Subtract Worksheets

For Students 3rd - 4th Standards
There are actually two Independence-Day-themed worksheets in this resource. Patriots solve three-digit addition and subtraction problems, then find the letter from the key that corresponds to each of their answers. As they place each...
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Worksheet
Curated OER

Linear Equations

For Students 8th - 11th
In this algebra worksheet, students solve linear equations through graphing and the use of formulas. There are 34 questions ranging from addition and subtraction of linear equations to graphing and substitution.
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Worksheet
Curated OER

Odd or Even (Sums and Differences)

For Students 1st - 2nd
In this math worksheet, students examine 14 problems inside geometric shapes. Students solve the simple addition or subtraction problems and color the shape blue if the answer is even and red if it is odd.
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Lesson Plan
Curated OER

Translating Between Verbal and Algebraic Expressions

For Teachers 8th - 10th
Students translate between verbal and algebraic expressions. After folding paper into four sections (multiplication, division, addition, and subtraction), students list code words under the appropriate section title. Next, they...
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Interactive
CK-12 Foundation

Sums of Integers with Different Signs: Adding Between 10 and -10

For Students 6th - 8th Standards
Six questions make up an interactive designed to boost scholars' knowledge of integers. Mathematicians move symbols over a horizontal number line to aid in findings answers between 10 and negative 10. Question types include...
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Lesson Plan
Curated OER

Clock Arithmetic and Cryptography

For Teachers 2nd - 5th
Learners perform basic operations in modular (clock) arithmetic. Students encode and decode messages using shift and affine ciphers. Learners apply their multiplication, division, addition, and subtraction skills.
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Unit Plan
Mathematics Vision Project

Module 7: Modeling with Functions

For Students 9th - 12th Standards
The sky's the limit of what you create when combining functions! The module begins with a review of transformations of parent functions and then moves to combining different function types using addition, subtraction, and multiplication....
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Lesson Plan
Curated OER

Working with Cuisenaire Rods In Mathematics

For Teachers 4th
Fourth graders learn the numerical value of each underlined letter of the standard Rod Code and develop systematic usage for building new units.
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Lesson Plan
Curated OER

People making a difference

For Teachers K - 2nd
Students identify resources that all humans need and compare needs and wants. In this needs and wants lesson plan, students discuss with their teacher situations in which people need or want items and how some people don't have the...
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Worksheet
Curated OER

Quiz: Calculator Fun

For Students 7th - 8th
In this calculator fun worksheet, learners use a calculator to find the product, quotient, sum and difference of given equations. Afterward, they turn the calculator upside-down to discover a word displayed on the calculator screen. This...
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Lesson Plan
Curated OER

Solving Single-Step Word Problems

For Teachers 3rd - 5th
Math wizards learn the five-step plan to solve math word problems. They investigate the five-step process for solving word problems, and examine the use of code words for each of the operations and solve a problem using the strategies.
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Worksheet
Curated OER

You Know the Answer: Math Riddle

For Students 3rd - 6th
Although the riddle is an outdated political reference, this math challenge is a good practice in operations and domain-specific vocabulary. Learners complete 18 problems, using multiplication, division, subtraction, and addition. Some...