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Activity
Illustrative Mathematics

Measuring Blocks

For Students 1st Standards
Stack them together to get a measurement. The short activity has pupils work in pairs to measure the lengths of two blocks and then determine the length of the two blocks together. The groups then determine an equation that represents...
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Printables
1
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Curriculum Corner

Number Cards

For Students Pre-K - 1st Standards
Showcase numbers one through twenty with a set of cards that displays each numeral in a bold, easy-to-read font. 
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Printables
1
1
Curriculum Corner

Number Cards 1–20

For Students K Standards
Reinforce number identification with a set of colorful cards showcasing numbers 1 through 20.  
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PPT
Curated OER

Ordering to 20

For Teachers K - 1st
Given a series of number lines, learners fill in missing number from 1-20 using the number pool provided. They add each number untill the number line is complete. This is a great activity to foster counting skills, number ordering, and...
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PPT
Curated OER

Numbers 1-20

For Teachers Pre-K - K
Count along as a class! Each slide contains a number and objects to count, 1-20. The images are fun and as they reach 10+ are grouped by ones and tens. This resource could be used in a variety of ways, is well put together, and has fun...
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Lesson Plan
Curated OER

Tens and Ones Fun

For Teachers K - 1st
Youngsters use their large motor skills to build numbers to 20 in this outdoor, kinesthetic, collaborative activity. Amass cardboard boxes for groups to stack, sort, and bundle into 10s and 1s to show numbers and place value. They'll...
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Worksheet
Curated OER

Addition and Subtraction: numbers to 20

For Students 2nd - 4th
Does your school encourage learning math facts or fast facts? If it does you can definitely use this resource. There are 20 lists, each list contains 10 problems, and each problem set focuses on adding and subtracting specific numbers,...
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Worksheet
Curated OER

Addition and Subtraction Problems: numbers to 20

For Students 2nd - 4th
You'll never be out of subtraction worksheets again. Here are 11 different sheets that require learners to add or subtract to find sums or differences up to or less than 20. Perhaps these can be used at home, at a work station, or to...
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Lesson Plan
Curated OER

Reading Number Words

For Teachers 1st - 3rd
In this number words worksheet, students read number words and match them to their numbers for numbers 1 through 20. Students do this in pictures of suns.
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PPT
Curated OER

Numbers and Number Names

For Teachers K - 2nd
Children practice identifying numbers and number names by calling out or drawing a line to match the number to its name. Each number or name is printed on a different color, which makes this resource highly visual. The last slide...
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PPT
Curated OER

Missing Numbers 1-20

For Teachers K - 2nd
Learners are presented with a series of number lines, each one is missing a number from 1-20. They click on the number options at the bottom of the page to fill in the gap on each number line. This activity would be great at an...
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Worksheet
Curated OER

Practice Numbers 11-20

For Students Pre-K - 1st
Your small-handed mathematicians practice tracing and writing numbers from 11 to 20 in this straightforward instructional tool. Trace 3 times; write several more. 
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Lesson Plan
Curated OER

Developing Number Concepts

For Teachers K - 1st
Children count and group a set of beans, sorting into groups of 10 and noting the number that remains. Young scholars understand the concept of numbers greater than ten, and play a game, guessing numbers greater than 10 using hints given...
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Worksheet
Math Salamanders Ltd.

Missing Subtraction Facts to 20 sheet 2

For Students 2nd - 3rd Standards
They can tackle this instructional activity once your class has mastered basic double-digit subtraction. They'll need to find the missing subtraction facts to 20 that complete each problem.
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Lesson Plan
Curated OER

Solve Story Problems: Sold! A Mathematics Adventure

For Teachers K - 2nd
Young mathematicians listen to the book Sold!: A Mathematics Adventure by Nathan Zimelman where they encounter ways to solve story problems. They then create and solve start unknown addition and subtraction equations. Resource builds in...
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Worksheet
Curated OER

Counting From 1 to 20

For Students 1st - 4th
Children are given a mixed up number chart 1-20, and are asked to sort out all the even, odd, prime, and composite numbers. This worksheet is intended for 2nd grade but may not be suitable for learners under 10 or those who have not yet...
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Worksheet
Curated OER

Compare Numbers to 100,000 +-999 (H)

For Students 3rd - 4th
In this number comparisons worksheet, students study the number pairs that range to 100,000. Students compare the numbers by writing in a greater than, less than, or equal to sign for the 60 problems.
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Worksheet
Curated OER

Cleopatra

For Students K - 2nd
In this addition worksheet, students solve 10 addition math problems within a picture of Cleopatra and then follow the color chart to color in each answer a specific color.
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Worksheet
Curated OER

Numbers 1-10

For Students Pre-K - K
In this numbers worksheet, students color in 10 number pictures. Students fill in the missing numbers from 1-10. Students also point to the numbers 1-20 as they count.
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Interactive
Curated OER

Greatest Common Factor

For Students 3rd - 6th
In this greatest common factor worksheet, learners find the greatest common factor of 2 numbers that are up to 20. Students complete 10 problems.
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Worksheet
Curated OER

Subtraction Practice

For Students 1st - 4th
In this subtraction worksheet, learners subtract numbers up to 20 in the horizontal form. Students complete 14 pages with 22 problems each.
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Worksheet
Curated OER

Find the Median #2

For Students 3rd - 6th
In this median activity, students find the median of a group of one and two digit numbers with numbers up to 20. Students complete 6 problems total.
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Worksheet
Curated OER

Division to 5x5 sheet 2

For Students 3rd - 6th
In this division worksheet, students use their knowledge of multiplication facts to solve division facts with numbers up to 20. Students complete 40 problems.
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Worksheet
Curated OER

Addition - up to 20 sheet 5

For Students 2nd - 3rd
In this addition worksheet, students complete missing addend problems where they plug in numbers 1 - 20. Students complete 40 problems.