Interactive
CK-12 Foundation

Properties of Real Number Addition: The Secret of Subtraction

For Students 6th - 8th Standards
Learners sometimes struggle to understand the concept of adding and subtracting integers. Help them see the why behind their answers using the interactive number line. The values change as individuals adjust the number line for each new...
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. 
Lesson Plan
Curated OER

Master Spy

For Teachers 3rd - 5th
Students explain that a code is a system of symbols, letters, words, or signals that are used instead of ordinary words and numbers to send messages or to store information. They practice deciphering a variety of secret codes used in...
Lesson Plan
Curated OER

Holocaust

For Teachers 8th
The Holocaust is the focus of this interactive poetry strategy. The classroom will be set-up to remind students of the Secret Annex, with a table, lamp, and various other props. Each participant will receive 3  Saltine crackers and...
Worksheet
Curated OER

Meet the Recycle Guys

For Students 2nd - 3rd
For this recycling activities worksheet, students draw lines to connect the names of the Recycle Guys to their pictures and use a number-letter code to find their secret message. Students write 37 answers.
Interactive
Curated OER

Astronomy: Star Commander

For Students 3rd - 5th
In this online interactive astronomy worksheet, students access a specific website to answer 10 questions involving astronomy in order to unscramble a secret message.
Lesson Plan
Curated OER

Writing a Secret Message - Geography

For Teachers 7th - 9th
Students select a specific area in geography and write a secret message about the area for students to guess. In this geography lesson, students write a secret message about a specific geographical location. Students present their secret...
Worksheet
Curated OER

"The Secret Life of Trees" Spelling

For Students 2nd - 3rd
In this spelling worksheet, students fill in bubbles with he letters that correctly spell a set of 10 words from The Secret Life of Trees. Words are given on page 2.
Worksheet
Curated OER

"The Secret Life of Trees" Spelling Activity

For Students 2nd - 3rd
In this spelling worksheet, students bubble in the letters that spell a set of words from the story The Secret Life of Trees. Words are dictated by the teacher.
Worksheet
Curated OER

"The Secret Life of Trees" Spelling Words

For Students 2nd - 3rd
In this spelling worksheet, students find a set of 10 words from The Secret Life of Trees in a word search puzzle. Words are given at the bottom of the page.
Worksheet
Curated OER

"The Secret Life of Trees" Crossword Puzzle

For Students 1st - 3rd
In this crossword puzzle worksheet, students use clues to write a set of words from The Secret Life of Trees. Clues are given at the bottom of the page.
Worksheet
Curated OER

The Secret Life of Trees: Tall and Short Letters

For Students 1st - 3rd
In this spelling word visualization activity, students write 10 words from the book The Secret Life of Trees in boxes that represent the tall and short letters of each word.
Worksheet
Curated OER

Secret Message - Division

For Students 3rd
In this secret message division learning exercise, 3rd graders find the quotients in 6 division problems. They divide either one or two digit numbers by one digit numbers. They use the quotients to determine the letters that are placed...
Lesson Plan
Curated OER

How to Send a Secret Message

For Teachers 3rd - 6th
For this social studies worksheet, young scholars learn how sending secret messages was very important during World War II. Students are given a list of material needed and instructions to create their own secret message.
Lesson Plan
Curated OER

Dilemmas and Dealing with Them - Secrets

For Teachers 7th - 12th
Students read an article about the secrets young people keep from adults with regards to the internet. Small groups analyze a worksheet of common dilemmas and agree on solutions for each problem. The whole class shares solutions for...
Worksheet
Curated OER

Squigly's Secret Code

For Students 1st - 2nd
For this word puzzle worksheet, students decipher the answer to a "secret code." Students analyze a code in which each letter of the alphabet is represented by a symbol.
Worksheet
Curated OER

Squigly's Secret Code: Car

For Students 1st - 2nd
In this puzzle worksheet, students decipher a "secret" code. Students determine the message by filling in the letter that goes with each symbol.
Worksheet
Curated OER

Secret Code

For Students 2nd - 3rd
In this multiplication puzzle worksheet, 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.
Activity
Computer Science Unplugged

Sharing Secrets—Information Hiding Protocols

For Teachers 4th - 12th
Did you know that you can find the average age of a group of people without anyone having to real their age? This resource provides directions for way to do just that. After the activity, class members read a short passage...
Lesson Plan
Curated OER

Soil's Secret

For Teachers 9th - 12th
Students examine two types of soils in their area. They identify its texture and permeability to determine its origin. They share their results with the class.
Lesson Plan
Curated OER

Find the Secret Word

For Teachers Pre-K - 1st
In this early childhood word recognition worksheet, students follow the instructions to spell the word cat and then color the cat.
Lesson Plan
Curated OER

Matrices: A Secret Weapon

For Teachers 9th - 11th
Students perform operations with matrices. In this algebra lesson, students use cryptography and cryptanalysis to solve problems. They add, subtract, and multiply matrices.
Lesson Plan
EngageNY

Paragraph Writing Instruction

For Teachers 3rd Standards
Writing a paragraph from details found directly in a text is the central focus of this thorough and explicit lesson plan. Using the stories Nasreen's Secret School and Rain School, third graders are lead step-by-step...
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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