CK-12

CK-12 provides open-source high quality K-12 learning platform to help teachers provide learning opportunities for students globally. Free access to 5000+ high-quality, customizable educational concepts in multiple modalities (text, videos, quizzes, images etc.) suited to different learning levels will allow teachers, students and others to innovate and experiment with new models of learning. Learn more at: www.ck12.org/teacher

Lessons 668
Views 89,480

Estimation of Whole Number Addition & Subtraction

CK-12
Updated:
2016
Students will learn how to round whole numbers in order to estimate sums and differences.

Estimating Whole Number Multiplication & Division

CK-12
Updated:
2017
• Math
Students will learn how to round and find compatible whole numbers in order to estimate products and quotients.

Prime and Composite Numbers

CK-12
Updated:
2016
• Math
• 3-5, MS
Students will learn how to identify and classify numbers as either prime or composite.

Factor Pairs

CK-12
Updated:
2016
• Math
• Middle School
Students will discover how to determine the factor pairs of given numbers.

Greatest Common Factor

CK-12
Updated:
2016
• Math
• 3-5, MS
Students will learn to find the Greatest Common Factor (GCF) of two numbers.

Greatest Common Factor Using Lists

CK-12
Updated:
2016
• Math
• 3-5, MS
Students will learn to find the greatest common factors of numbers using lists.

Greatest Common Factor Using Factor Trees

CK-12
Updated:
2016
• Math
• 3-5, MS
Students learn to find the greatest common factor of a given number using factor trees.

Divisibility Rules to Find Factors

CK-12
Updated:
2016
• Math
• 3-5, MS
Students will discover how to determine the factors of given numbers using divisibility rules.

CK-12
Updated:
2016