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Interactive
Curated OER

Law of Cosines

For Students 9th - 12th
For 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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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

Time

For Teachers 6th - 12th
Students make a sundial. In this time instructional activity, 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...
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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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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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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
Curated OER

Estimating Fish Populations

For Teachers 6th - 12th
Students describe the mark/recapture method used to estimate fish populations. They explain the importance of being able to predict population numbers.
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Worksheet
Curated OER

Applied Mathematics I

For Students 12th - Higher Ed
In this applied mathematics worksheet, students solve 4 various sets of problems that include scalar equations, existence of solutions, and inverse problems. They determine the number of solutions of a problem shown and justify their...
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Lesson Plan
Curated OER

Square Roots, Number Classification, Ordering & Graphing

For Teachers 9th
Ninth graders identify numbers as rational or irrational. Using calculators estimation, and factoring methods, 9th graders compute the square root of numbers. They graph numbers in sequential order and round numbers integers to the...
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Worksheet
Curated OER

Geometric Mean and the Pythagorean Theorem

For Students 10th
In this geometric mean and Pythagorean Theorem learning exercise, 10th graders solve 9 problems related to determining the geometric mean by applying the Pythagorean Theorem in each problem. First, they find the geometric mean between...
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Worksheet
Curated OER

Significant Figures

For Students 7th - 10th
In this significant figures learning exercise, students indicate the number of significant figures and then round each to the number of significant figures shown. This learning exercise has 20 problems to solve.
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Activity
Curated OER

Calories in a sports drink

For Teachers 7th - 10th Standards
How much can a company round numbers without being misleading? Learners investigate the accuracy of claims made by a sports drink company. Teachers could easily modify the activity by bringing in their own beverage bottles, or by taking...
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Lesson Plan
Curated OER

Estimating With Fire

For Teachers 7th - 9th
Students solve problems with percents, decimals and fractions. In this algebra lesson, students convert between fractions, percents and decimals. They estimate their answers and calculate their answer.
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Lesson Plan
Bowland

AstroZoo

For Teachers 6th - 9th
Rescue animals in the zoo by applying math concepts. Groups of learners solve three missions involving oxygen, food, and climate control. Each group selects an animal from one of four bio-domes.
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Assessment
Bowland

Royal Liver Clock

For Teachers 6th - 9th
Using clocks as dining tables? Scholars estimate the number of people that can sit around the face of the clock on the Royal Liver Building in Liverpool. They use estimation to justify their responses.
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Lesson Plan
EngageNY

Sampling Variability in the Sample Mean (part 1)

For Students 10th - 12th Standards
How accurate is data collected from a sample? Learners answer this question using a simulation to model data collected from a sample population. They analyze the data to understand the variability in the results.
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Lesson Plan
Curated OER

Concept: Square Root

For Teachers 7th - 10th
In this square root worksheet, students solve problems with exponents. They find the square root of given numbers. Students ill in missing numbers on a radical clock face. This eleven-page worksheet contains notes, detailed instructions...
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Lesson Plan
Curated OER

How Many Stars in the Milky Way?

For Teachers 8th - 11th
Students perform an experiment in which they will use a statistical method called `sampling' to count to a billion (and beyond). Students practice sampling by estimating the number of characters on a page from the classified section of a...
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PPT
BW Walch

Creating Linear Equations in One Variable

For Teachers 9th - 10th Standards
The example of two travelers meeting somewhere along the road has been a stereotypical joke about algebra as long as algebra has existed. Here in this detailed presentation, this old trope gets a careful and approachable treatment....
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Activity
101 Questions

Circle-Square

For Teachers 9th - 12th Standards
How do the area and perimeters of circles and squares compare? A clever video illustrates the change in the area of a circle and square while their total perimeter stays the same. The task is for learners to predict the point where the...
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Lesson Plan
Curated OER

Squares and Square Roots

For Teachers 8th - 10th
Learners find patterns relating the lengths of the sides of squares to their areas. In this squares and square roots lesson, students draw squares and find their areas. They estimate the sides of square when given the area. Learners use...
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Worksheet
Curated OER

High School Mathematics Problems from Alaska: Cigarette Smoking

For Teachers 9th - 12th
Students analyze the monetary cost associated with smoking. Students use statistics to determine life expectancy and cost associated with smoking.
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Worksheet
Curated OER

Numerical Analysis/ Floating Point Arithmetic

For Students 11th - Higher Ed
In this math worksheet, students examine the concept of floating point arithmetic. They compare the tools of chopping and rounding to measure accuracy.
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Worksheet
Curated OER

Decimals: checkbook and money

For Students 9th - 12th
In this decimal learning exercise, students complete problems having to do with a checkbook, money, the cost of items, and more, with numbers containing decimals. Students complete 3 problems.

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