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Worksheet
Curated OER

Prime Factorization - Practice 7-2

For Students 3rd - 5th
Finding the prime factors of two numbers is the focus of this math learning exercise. Students write the factors to complete 2 factor trees, write the prime factorization for 9 numbers and answer 2 word problems.
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Worksheet
Curated OER

Factors and Factorization

For Students 6th - 8th
In this factors worksheet, students list all factors of given numbers.  All numbers are positive and contain two to three digits.  This four-page worksheet contains 28 problems.  Answers are provided.
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Worksheet
Curated OER

Finding Factors

For Students 6th - 8th
In this finding factors worksheet, students practice finding all the factors of 24 in twenty word equations and then find the prime factorization in ten equations.
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Lesson Plan
Curated OER

Prime Factorization: Finding Factors in the Fifth Grade

For Teachers 5th
The lesson starts out with a brain drain, which is a great way to get students to activate prior knowledge and build lasting connections. They tell everything they know about prime factorization, use their knowledge to...
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Worksheet
Curated OER

LCM-Factor Trees

For Students 4th - 6th
In this LCM learning exercise, students use work space provided to create factor trees and find the LCM of sets of numbers. Answers are included on page 2.
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Lesson Plan
Curated OER

Learning About Trees

For Teachers K - 2nd
After looking at pictures of trees, discussing tree growth, and identifying the parts of a tree, lead your class on a nature walk and have them collect samples and record their observations. They then work in pairs to polish the...
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Lesson Plan
US Environmental Protection Agency

Tree Rings: Living Records of Climate

For Teachers 5th - 10th
Open with a discussion on weather and climate and then explain how tree rings can provide scientists with information about the earth's past climate. Pupils analyze graphics of simulated tree rings from various US locations for the...
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Interactive
Scholastic

Study Jams! Least Common Multiple

For Students 5th - 7th Standards
RJ instructs your sixth graders in two different methods of determining least common multiples. The first is by listing several multiples of each number, and the second is by drawing factor trees. This is an ideal flipped classroom...
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Lesson Plan
Curated OER

Greatest Common Factor: Using the Factor Tree

For Teachers 9th - 10th
Young scholars find the greatest common factor of two numbers. In this algebra lesson, students use prime factorization to find their factor to simplify equations. they create a factor tree to find the factors of composite numbers.
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Lesson Plan
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Chicago Botanic Garden

What Can Tree Rings Tell Us About Climate?

For Teachers 10th - 12th Standards
Tree rings are slightly thicker on the south side of the tree because it receives more sunlight. Part two in a series of five lessons helps learners analyze tree rings to determine the environmental conditions that caused size...
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Worksheet
Curated OER

Factor Trees and GCF

For Students 6th - 8th
In this prime factorization and greatest common factor instructional activity, students use factor trees to find the prime factorization of 8 numbers. They find the GCF of six pairs of numbers.
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Lesson Plan
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Willow Tree

Factoring Polynomials

For Students 8th - 11th Standards
Young mathematicians discover trees organize more than just families — they help factor, too. The lesson begins with factor trees and develops slowly to factoring by grouping and special patterns. 
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Activity2:06
PBS

Human Tree: Ratios

For Students 6th - 7th Standards
Create a personal tree. By visiting an exhibit at the National Museum of Mathematics, the resource introduces the idea of fractals. The exhibit takes an image of the person and creates a tree by repeating scaled images on the shoulders...
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Assessment
Mathed Up!

HCF, LCM, and Product of Primes

For Students 6th - 8th Standards
Give the class a prime example of using prime numbers. After reviewing prime factorization of numbers with the video, pupils use their knowledge to determine greatest common factors and least common multiples in the worksheet. The...
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Lesson Plan
Alabama Learning Exchange

How Old Is That Tree?

For Teachers 3rd - 5th
Fifth graders study environmental changes by examining the annual rings of a cross-section of a tree trunk. They access websites to complete a worksheet on the parts of a tree. They count the annual rings on a tree slice while observing...
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Worksheet
Curated OER

Prime Factorization

For Students 5th - 8th
In this prime factorization worksheet, students complete factor trees for 2 digit numbers to find their prime factorization. Students complete 6 problems.
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Worksheet
Curated OER

Prime Factorization, Equivalent Fractions and GCF review

For Students 7th - 9th
In this sample test worksheet, students solve twenty-five problems covering prime factorization, equivalent fractions, greatest common factor, and plotting on a number line.  Solutions are provided.
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Lesson Plan
Curated OER

Missing Factors

For Teachers 3rd - 5th
Students explore factors. They discuss factors, factor trees and prime factors. Students practice working with and finding various factors and prime factors. They discuss methods used to find factors.
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Lesson Plan
Curated OER

Prime Numbers and Factors

For Teachers 5th - 7th
Solving factor trees is a helpful way to introduce prime numbers. Your math class practices using this method along with two-column tables to find if a number is prime or not. They also learn other vocabulary, such as composite numbers,...
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Worksheet
Curated OER

Greatest Common Factor: Reteach

For Students 5th - 6th
In this greatest common factor worksheet, students review the different ways to find the greatest common factor for numbers including listing all the factors and finding prime factorization with factor trees. Students then list the...
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Lesson Plan
National Wildlife Federation

Branching Out – Exploring Dendrochronology

For Teachers 9th - 12th Standards
Tree rings from North America give a continuous history of El Nino intensity over the last 1,100 years. Scholars learn how scientists use tree rings to create timelines demonstrating variations in weather patterns. The cumulative...
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Worksheet
Curated OER

Biotic and Abiotic Factors

For Students 9th - 10th
In this biotic and abiotic factors learning exercise, students complete 20 various types of questions related to biotic and abiotic factors. First, they write the vocabulary word that best completes the sentence. Then, students state an...
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Worksheet
Curated OER

Tree-Ring Activity

For Students 7th - 9th
In this tree ring worksheet, students analyze tree ring samples to determine the age of the tree. They compare them to archived samples and answer questions about the age of the tree and its growth years and abnormal growth years.
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Lesson Plan
Curated OER

Lord of the Rings - A Study of Tree Rings

For Teachers 7th - 8th
Students examine trees and discuss how the environment effected the tree. They also predict what the area look like in fifty years.

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