Interactive
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Least Common Multiple or Least Common Denominator

For Students 5th - 6th
Fifth and sixth graders solve 12 math problems by finding the least common multiple or least common denominator. They type the answer into the text box.
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Oregon Department of Education

Building Number Sense

For Teachers Pre-K - 1st Standards
It's never too early to begin a child's math education. This collection of fun hands-on activities engage youngsters in building their number sense as they learn how to count objects, identify numerals, compare amounts, and much more.
Lesson Plan
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How Does Radon Get Into Your Home?

For Teachers 6th - 8th
Students complete an experiment in which they measure the radon level in their home. They examine the different types of units of measurement and practice using them throughout the activity. They calculate surface area on objects as well.
Lesson Planet Article
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Teaching the Subjects You Never Liked

For Teachers 1st - 8th
Having to teach your least favorite subjects isn't always fun, but can be a learning experience for both teacher and student.
Lesson Plan
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Charging Up, Charging Down: Exponential Models

For Teachers 10th - 12th
Students collect and analyze voltage data. In this math lesson, students investigate exponential functions using the TI and a Voltage Probe. They graph their data and analyze it using a table.
Lesson Plan
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How much is a movie worth?

For Teachers 6th - 8th
Students discover how much a movie is worth. They use decimals and percentages greater than 100 to complete this activity.
Lesson Plan
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Prime and Composite Numbers

For Teachers 6th
Sixth graders identify prime and composite numbers and complete an activity problem. Given a 100 chart, they follow directions to create a prime number chart. In groups, 6th graders play a "Prime Take Away" activity to reinforce prime...
Lesson Plan
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Sieve of Eratosthenes

For Teachers 8th - 12th
Students investigate numbers, ways of representing numbers, relationships among numbers and number systems. They comprehend the meaning of operations and how they relate to each other.
Lesson Plan
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The Numbers Get Larger

For Teachers 2nd
Second graders examine how to use mental strategies for addition and subtraction. They look at part/whole strategies for multi-digit problems and define which one would be best used for a particular problem. They use tens frames to solve...
Lesson Plan
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Expected Value

For Teachers 9th - 12th
Students discuss what expected value is, they are introduced to the concept of varyting payoffs. Students use a computer simulation of a "real world" example where expected value is used.
Lesson Plan
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The Number Partner

For Teachers 1st
First graders study number pairs and identify number pairs that sum to numbers from 10 to 30. They use number pairs to solve addition and subtraction problems. They make sensible estimates and check the reasonableness of answers.
Worksheet
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Family Letter and Activity: Cars, Trucks and Percents

For Students 4th - 5th
In this math learning exercise, students will take home a letter to their parents explaining that they are studying Chapter 10: Ratio, Proportion and Percent. Then students will complete a homework activity in which they ask family and...
Lesson Plan
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The Part-Adder 2

For Teachers 3rd
Third graders use mental-math strategies to solve two-digit plus two-digit addition problems. They observe and discuss online demonstrations, solve word problems as a class, and independently solve problems and describe their solutions...
Lesson Plan
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M & M Percentages Activity

For Teachers 6th - 9th
Students complete a worksheet using M & M's to calculate percentages. They are given demonstrations by the teacher to know how to complete the activity.
Lesson Plan
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Up We Go

For Teachers 1st
First graders examine the use of number lines in problem solving situations in this series of lessons. They participate in activities in which they move forward and backward on number line on the playground before doing paper and pencil...
Lesson Plan
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How Do You Pay a Complement to an Angle?

For Teachers 9th - 12th
Young scholars observe and solve examples of the complementary angle theorem. They complete the How Do You Pay a Complement to an Angle worksheet, and write a response in their math journal.
Lesson Plan
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Make a 100

For Teachers 2nd
Second graders develop an understanding of 100 and the quantity for which it stands and examine the relationship between 100 and 10 by estimating the number of jelly beans in a jar.
Lesson Plan
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Ratios, Proportions, and Cross-multiplication

For Teachers 6th - 8th
Learners use cross-multiplication to find the unknown respiration rate of an astronaut. In this multiplication lesson plan, students also use the same process to find missing values in proportions.
Lesson Plan
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The Mystery of the Accelerating Race Car

For Teachers 9th - 12th
Students define and discuss acceleration and how to compute acceleration. They observe examples of computing acceleration, and complete a worksheet using the correct formula.
Lesson Plan
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The Multiplier (larger 2-digit by 1-digit numbers)

For Teachers 5th - 7th
Students utilize number sense applications to multiply two digit numbers. They use "The Multiplier" and Internet source to partition and solve 2 digit by 1 digit multiplications. Students describe how to solve 2-digit by 1-digit...
Lesson Plan
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Comic Strip Creations

For Teachers 3rd - 5th
Students identify nouns, adjectives, and verbs from the newspaper. They create a math story problem, then create a comic strip using dialogue from words found in the newspaper.
Lesson Plan
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Patterns in Pascal's Triangle

For Teachers 7th - 9th
Pupils examine the patterns that exist in Pascal's Triangle. They explore multiples and factors. Sudents use an applet to create and color the multiples in Pascal's Triangle.
Worksheet
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Family Letter - Foreign Currency and Exchange Rates: Proportions and Ratios

For Students 6th - 8th
In this proportions and ratios worksheet, learners solve 6 short answer problems. Students find the foreign currency exchange rates for six countries. Learners express the exchange rate as a proportion or ratio.
Lesson Plan
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Counting Using Money

For Teachers 2nd
Second graders count fake money by grouping like coins together. For this counting lesson plan, 2nd graders complete worksheets provided in this lesson.