PPT
Curated OER

Using Number lines in Addition and Subtraction

For Teachers 2nd - 3rd
Adding and subtracting can be done by counting on or counting down a number line. This presentation provides a complete demonstration and examples of how one can use a number line to solve double-digit addition and subtraction problems....
Worksheet
Curated OER

Time to Trick-or-Treat!

For Students 2nd - 4th
Use number lines to help scholars add and subtract time as they solve five word problems. Each scenario gives a starting or ending time and several tasks that take specified amounts of time. Scholars mark the number line to determine...
Lesson Plan
American Chemical Society

Formation of a Precipitate

For Teachers 3rd - 8th
Conclude this chemical change unit by having your class combine two liquids that result in formation of a precipitate. The learners discover that chemical reactions result in new materials. Make sure to consider all of the preceding...
Unit Plan
National Security Agency

Introducing Integers and Their Operations

For Teachers 6th - 8th Standards
There's nothing negative about this mini-unit on integers! Engaging young mathematicians in a series of hands-on activities and collaborative learning opportunities, this resource offers an excellent way to introduce your class...
Worksheet
Curated OER

Solving One-Step Inequalities by Adding/Subtracting

For Students 7th - 8th
In this solving inequalities worksheet, students add and subtract to isolate the variable for 26 inequalities. Each solution is then graphed on a number line.
Worksheet
Raytheon

Adding and Subtracting Decimals

For Students 5th - 7th
For this adding and subtracting decimals instructional activity, students add and subtract numbers with decimals in word problems. Students complete 12 word problems.
Worksheet
Curated OER

Adding and Subtracting from 10

For Students 1st - 2nd
Here is a nicely designed learning exercise on adding and taking away from ten. Learners complete the simple problems with the help of a number line that appears at the top of the page. Some of the equations have a missing addend, but do...
Lesson Plan
Curated OER

Study Buddies: Adding Two-Digit Numbers

For Teachers 1st - 2nd
Some times a simple lesson plan is all you need. Here are 2 worksheets that can be used as a lesson plan on problem solving, addition, and partner work. The first worksheet has learners use a tens and ones charts to practice adding...
Worksheet
Curated OER

Working with 10s and 1s, Part 2

For Students K - 2nd Standards
Practice place value by visualizing 10s and 1s. First graders count the cubes in each place, then write the total number at the bottom. In one particularly helpful section, they draw the cubes that will add up to a given number. Bring in...
Worksheet
Curated OER

Add or Subtract (up to 50)

For Students 2nd - 3rd Standards
Do you add or subtract? It's up to your mathematicians as they fill in the symbol for 16 equations to make them true. The numbers in this section don't exceed 18. Next, learners answer six word problems by determining the missing addend...
Lesson Plan
Illustrative Mathematics

Discounted Books

For Teachers 6th - 8th Standards
Adolescents love to shop, especially when an item is discounted. Here, shoppers only have a set amount of money to spend. Will they be able to make a purchase with the discount and tax added in? Percent discounts can be calculated...
Lesson Plan
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Willow Tree

Arithmetic and Geometric Sequences

For Students 8th - 11th Standards
Old mathematicians never die; they just lose some of their functions. Studying sequences gives scholars an opportunity to use a new notation. Learners write functions to model arithmetic and geometric sequences and use them to find new...
Worksheet
Curated OER

Real-life Problems, Working with Decimals

For Students 4th - 5th Standards
Put your learners' decimal skills to the test with these five word problems. With space for students to write their work, the word problems contain addition and multiplication problems with money and measurement units. Use this resource...
Worksheet
Curated OER

Addition: Number Bonds to 10

For Students 1st Standards
You have the answer and a variable, but something is missing! The class fills in the missing addend in 23 practice problems that all add up to 10. This is a great way to build number sense, pattern recognition, and automaticity.
PPT
Curated OER

Tens and Units

For Teachers K - 2nd
Images of base ten blocks are used to reinforce counting past 10. Learners will count along, adding units to each 10 as they go from 10 to 30.  Each number is shown on a 100 block, as blocks of 10s and 1s, and in numeric form as...
Worksheet
Curated OER

Adding 2-Digit Numbers

For Students 2nd - 3rd Standards
If you're looking for guided addition problems, here is a practice list of 30. All of these have two double-digit addends, and many require regrouping. There are three example problems for learners to reference, each of which also...
Worksheet
Curated OER

Choose the Operation: Plus or minus (up to 100)

For Students 2nd - 4th Standards
Investigate the relationship between addition and subtraction as scholars fill in these number sentences, each of which is missing a symbol. Is it a subtraction or addition equation? There are 20 of these to start, all written...
Worksheet
DK Publishing

Learning 9 - Write the Number

For Students Pre-K - K Standards
As novice counters learn numbers 0-10, use this exercise to focus on the number nine. They begin by tracing and printing the numeral several times. Next, learners count sets of stars and record the totals, all of which are nine....
Worksheet
Curated OER

Everyday Problems with Decimals

For Students 3rd - 5th Standards
Review word problems and decimals with a worksheet that features everyday problems for your students to solve. Six problems provide space for both work and the solution, reinforcing the importance of showing one's work in word problems....
Worksheet
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DK Publishing

Numbers 1 to 20

For Students Pre-K - 1st Standards
Practice writing numbers with fun kites. Kindergartners will rise to the highest height as they match the numbers to their correct written forms: 11 to eleven, 14 to fourteen, etc. Use this resource as a class activity or as a review...
Organizer
Curated OER

Magic Number Squares: School Related Vocabulary

For Students 6th - 9th
What an innovative way to review Spanish vocabulary! Provided is a chart containing 16 Spanish vocabulary words; their English translations are listed at the bottom of the resource page. The learner matches each translation with its...
Lesson Plan
Curated OER

Take a Stab!

For Teachers 5th - 8th
Your geology class practices taking core samples of a potato to examine the stratigraphy. This is a terrific modeling instructional activity that helps youngsters visualize strata that cannot be seen from the surface of the ground. The...
Organizer
Curated OER

Magic Number Squares: school items

For Students 6th - 8th
Middle schoolers play magic number squares to review school related vocabulary words. The grid provided has 16 Spanish words, and the class needs to match the English translation to the correct Spanish vocabulary word. But how do they...
Worksheet
K12 Reader

Change the Nouns to Adjectives

For Students 3rd - 4th Standards
A 10-item practice page requires scholars to change nouns to adjectives by adding the appropriate suffix.