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Worksheet
Curated OER

Tic-Tac-Toe Math

For Students 3rd
In this number sentence worksheet, 3rd graders figure out how the tic-tac-toe code words and then fill in the number sentences in the code. Students complete 10 coded number sentences.
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Lesson Plan
Curated OER

The Games Robots Play

For Teachers 6th - 12th
Students learn about how robots are programmed to play games. They then construct robot applications (basic computer codes) for playing tic-tac-toe comprised of if-then logic sequences. Students then compete in teams using their...
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Worksheet
Curated OER

Fifty Dollar Word$ From Ms. Smiley's Class

For Students 5th
For this math code worksheet, 5th graders analyze 6 words that have an exact value of $50 according to the code. Students encode each word using the values in the key and use any of the four basic math operations to show a final value of...
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Worksheet
Curated OER

Fifty Dollar Word$

For Students 5th - 6th
In this math code worksheet, students analyze 6 words that have an exact value of $50. Students encode each word with numbers from the key and use any of the four math operations to show a value of $50.
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Worksheet
Curated OER

Secret Code Message 2

For Students K - 2nd
In this letter and number recognition worksheet, students use a secret code box to help them spell 4 short Ee words. Students then draw pictures of the words.
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Worksheet
Curated OER

Color Code Coloring Sheet

For Students 1st - 2nd
In this coloring worksheet, students use the color code chart to color the picture of a boy according to the provided instructions.
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Worksheet
Curated OER

Secret Code

For Students 2nd - 3rd
In this multiplication puzzle instructional activity, students find the products to 18 elementary multiplication problems. They solve the code using the letters assigned to each product. They read the secret message.
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Lesson Plan
Curated OER

Code Breakers

For Teachers 6th - 8th
Students collect data and make a frequency table, change ratios into percents, and analyze data to make predictions.
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Worksheet
Curated OER

U.S. States: The Western States

For Students 2nd - 4th
In this addition worksheet, students solve 11 addition math problems found in the western states of the United States of America. Students follow the key and color code each state by its sums.
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Worksheet
Curated OER

Addition of Shapes

For Students 1st - 2nd
In this addition learning exercise, students count, write and add together 6 sets of different color-coded shapes in the boxes provided. Students totals will average between 10 and 18.
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Activity
Computer Science Unplugged

The Peruvian Coin Flip–Cryptographic Protocols

For Teachers 4th - 12th
A digital flip. Introduce your classes to cryptographic protocols using and, or, and not gates. Groups create a complete circuit to convert a binary number into another one. This type of one-way function allows pupils to verify the...
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PPT
Curated OER

Cracking the Code: Sequencing

For Teachers 3rd - 4th Standards
You've just found a teaching template ready to use, all you have to do is personalize it to fit your class. It contains five number sequences or patterns for learners to complete, a place for your name, and a "prize." Tip: This template...
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Lesson Plan
Curated OER

All Systems Go!

For Teachers 9th - 12th Standards
Secret codes are so much fun, and a great way to practice nearly any math skill. Let your class become code breakers as they investigate inverse matrices. They use TI-Nspire technology to solve systems of equations which help them crack...
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Handout
El Paso Community College

Geometry Definitions

For Students 7th - 9th Standards
Geometry is full of shapes, figures, and corresponding things here and there. The guide shares all of the key pieces of geometric information in a nicely color-coded and labeled sheet. 
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Handout
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Curated OER

Math Handbook: Trigonometry

For Students 9th - 12th Standards
You'll be spinning in unit circles once you read through this jumbo-sized resource of everything you need to know about trigonometry. Each page has color-coded examples with explicit directions that detail the problems and formulas. 
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Lesson Plan
Curated OER

Basic Crypto Systems

For Teachers 7th - 12th
Students try to solve codes mathematically. The use of a code needs a key. Students try to decipher a code with a mathematical key. This requires focus and higher order thinking skills like analysis.
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Lesson Plan
Curated OER

The Dot and Dashy Language

For Teachers 9th - 10th
Students examine and discuss the Morse Code. In small groups they develop messages using Morse code and take turns decipering the messages.
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Worksheet
Curated OER

Add 2-Digit Numbers in Different Ways

For Students 2nd - 3rd
In this solving addition word problems worksheet, students use secret code cards and counters to problem solve. Students solve six problems.
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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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Worksheet
Curated OER

Mystery Numbers

For Students 3rd - 4th
In this mystery number worksheet, students begin with a 3 digit number and using the code key, find the sum or difference in each shape as a spiral puzzle is solved.
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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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Lesson Plan
Curated OER

Code Crackers Math Game

For Teachers 6th - 8th
Middle schoolers, through this math game, are provided with opportunities to work with math operations and simple algebraic equations. They create a spreadsheet-based "rule machine."
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Lesson Plan
Curated OER

Code Crackers

For Teachers 6th - 8th
Learners work in teams creating and posing math rules and trying to guess them using a formula controlled worksheet they create with Excel. Student pairs take turns to see who can crack the other's code the fastest.
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Worksheet
Curated OER

Secret Code Math

For Students 1st - 3rd
For this math worksheet, students solve the problems in the box grids with the operation of addition. The answers are used to create a secret code message.

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