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Interactive
Curated OER

Law of Cosines

For Students 9th - 12th
In this cosine worksheet, students will find the length of the third side of a triangle given the length of the other two side. Students will use the Law of Cosines to find the length of the missing side. Answers will be rounded to 3...
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Printables
Kiz Club

Candy Jar Counting

For Teachers Pre-K - 1st Standards
How many candies are in the jar? Included here is an image of a jar to which you can add paper candies. Learners can practice estimating and adding skills.
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Lesson Plan
Illustrative Mathematics

How Many Leaves on a Tree?

For Teachers 9th - 12th Standards
This is great go-to activity for those spring or fall days when the weather beckons your geometry class outside. Learners start with a small tree, devising strategies to accurately estimate the leaf count. They must then tackle the...
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Lesson Plan
Curated OER

In the Ballpark

For Teachers 6th - 8th
Learners practice estimation skills with the video series "Interactions: Real Math, Real Careers". They complete a hands-on activity for estimating large numbers.
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Worksheet
Math Mammoth

Review 1

For Students 3rd
For this mathematics worksheet, 3rd graders write the numbers for each problem. Then they write each in expanded form and the numbers from least to greatest. Students also estimate first by rounding the numbers to the nearest hundred.
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Worksheet
Curated OER

Round Decimals to the Nearest Tenth

For Students 4th - 6th
Use this rounding decimals worksheet to have your charges round a set of 18 decimals numbers to the nearest tenth. Answers are included on page 2.
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Lesson Plan
Curated OER

Playing with Remainders

For Teachers 5th
Fifth graders explore how people handle remainders in real life. In this remainders math lesson, 5th graders participate in skits to show what to do with remainders. Students complete worksheets with word problems.
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Worksheet
Curated OER

Decimals-Round to Nearest Hundredth

For Students 4th - 5th
Learners round a set of decimal numbers to the nearest hundredth. Answers are included on page 2.
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Worksheet
Curated OER

Number Sense and Operations

For Students 5th
In this number sense and operations worksheet, 5th graders solve 17 different types of problems that include estimation and determining the exact answer of an equation. First, they determine the sum of two numbers closest to one listed....
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Lesson Plan
Curated OER

Time

For Teachers 6th - 12th
Young scholars make a sundial. In this time lesson, students determine the time of the day by creating a sundial. They check the time on the sundial, hourly, for one week. Afterward, they explore what happened to the shadows in reference...
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Worksheet
Curated OER

Estimate Sums

For Students 3rd - 5th
In this estimating sums worksheet, students solve 6 word problems where they estimate the sum of 3 digit numbers by rounding to the nearest 10, 100 or 1000.
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Worksheet
Curated OER

Round to Nearest 10-Hundreds Chart

For Students 2nd - 3rd
In this rounding worksheet, students round part of a hundreds chart up to the nearest 10 and the remaining part down. A website reference for additional resources is given.
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Worksheet
Curated OER

Estimating Practice

For Students 1st - 2nd
In this number sense worksheet, students examine the picture and estimate the number of ants in the picture.
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Lesson Plan
Curated OER

Estimating Percentages

For Teachers 6th - 9th
In this estimating percentages worksheet, students read a problem that gives the percentage of a dollar amount, for example; 8.6% of $75.09 = $5.46. They estimate to determine if they believe the problem is "definitely wrong" or...
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Worksheet
Curated OER

The Number of Neutrons

For Students 9th - 12th
Although the focus of this worksheet is the neutron, you cannot talke about them without also dealing with protons and electrons! Chemistry kids fill in a table of 14 elements, identifying the mass, atomic number, isotopic symbol, and...
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Lesson Plan
Curated OER

As a Matter of Fact

For Teachers 3rd - 6th
Elementary-aged scientists discover that all matter has mass. They are shown the difference between mass and weight, and learn how to calculate mass using the appropriate tools and methods. The scientific method is used while estimating...
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Lesson Plan
EngageNY

Rational Exponents—What are 2^1/2 and 2^1/3?

For Teachers 9th - 12th Standards
Are you rooting for your high schoolers to learn about rational exponents? In the third installment of a 35-part module, pupils first learn the meaning of 2^(1/n) by estimating values on the graph of y = 2^x and by using algebraic...
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Worksheet
Curated OER

Math in English Skills VI Exercise Book

For Students 1st - 6th
If you need a comprehensive math packet specifically intended for learners who are struggling with fractions, look no further. Individuals will be able to practice comparing, simplifying, adding, and subtracting fractions in an enjoyable...
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Lesson Plan
Indiana Science

How Many E’s?

For Teachers 6th - 8th Standards
Seventh graders explore random sampling by estimating the number of e's on the newspaper. They explain the possible error sources for this type of sampling, and compare the accuracy of sampling a small and large population. This is a...
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Assessment
1
1
Balanced Assessment

Sales Tax Table

For Students 9th - 12th Standards
Sales tax rates vary; do the math to find the right rate! Pupils use before tax amounts and after tax amounts to determine the tax rate. Rounding makes the task challenging.
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Lesson Plan
EngageNY

Square Roots

For Students 8th Standards
Investigate the relationship between irrational roots and a number line with a resource that asks learners to put together a number line using radical intervals rather than integers. A great progression, they build on their understanding...
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Lesson Plan
Mathematics Assessment Project

Modeling: Making Matchsticks

For Teachers 8th Standards
Math: The only subject where the solution to a problem is seven million matches. Young scholars first complete an assessment task estimating the number of matches they can make from a tree of given dimensions. They then evaluate provided...
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Lesson Plan
Curated OER

Ready to Round

For Teachers 1st
First graders are introduced to the concept of rounding to the nearest ten through the use of a number line created from a hundreds chart.
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Worksheet
Curated OER

E3 Practice Assessment - Pets

For Students 3rd
In this assessment learning exercise, 3rd graders complete eight pages of math assessment. Students solve problems related to money and a bar graph. Students solve word problems involving rounding and computation.

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