CK-12

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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

Total lessons: 668

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CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Middle School
Determine the factors of given numbers using divisibility rules. <BR> Divisibility Rules Factors MAT.ARI.173.L.1
CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Middle School
Find the least common multiple of a given pair of numbers using lists. <BR> common multiple LCM least common multiple MAT.ARI.174.L.1 multiple
CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Middle School
Compare fractions using lowest common denominators. <BR> denominator Equivalent fraction lowest common denominator MAT.ARI.174.1.L.1 numerator...
CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Middle School
Order fractions from least to greatest and greatest to least using lowest common denominators. <BR> denominator Equivalent fractions lowest...
CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Middle School
Write the prime factorization of given numbers. <BR> composite number Divisibility Rules factor tree Factors MAT.ARI.175.L.1 prime...
CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Middle School
Find the common multiples of given pairs of numbers. <BR> common multiple MAT.ARI.176.L.1 multiple
CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Middle School
Write numerical expressions to describe the product of a number and a sum of numbers. <BR> MAT.ARI.182.L.1 Numerical Expression Product Sum
CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Elementary (Grades K-2)
Basic Addition, one digit addition http://CK12.org
CK-12
Updated: 
Friday, July 15, 2016 - 1:33pm
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  • Elementary (Grades K-2)
Three to Six Digit Addition http://ck12.org
CK-12
Updated: 
Friday, August 5, 2016 - 2:53pm
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  • Math
  • Elementary (Grades K-2)
Adding Three Numbers with 2, 3, and 4 digits http://ck12.org