# CK-12

## PARTNER PROFILE

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

(11 Ratings)

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CK-12
Updated:
Thursday, August 11, 2016 - 12:23am
• Math
• 3-5, MS
Students learn how to add and subtract decimals by lining up the decimal point.

## Combinations of Decimal Money Amounts

CK-12
Updated:
Friday, August 5, 2016 - 2:53pm
• Math
• 3-5, MS
Students learn how to express combinations of coins as decimal amounts.

## Decimal Subtraction

CK-12
Updated:
Thursday, August 11, 2016 - 12:23am
• Math
• 3-5, MS
Students learn to subtract decimals by lining up the decimal points.

CK-12
Updated:
Wednesday, March 6, 2019 - 10:37am
• Middle School
Students how tornadoes form, their effects, and how they are measured. Tornadoes, which form from thunderstorms, are twisting masses of air that can...

CK-12
Updated:
Thursday, January 12, 2017 - 9:18am
1 Comment
• Science
• 3-5, MS
Students will learn what configurations of the Sun, Moon and Earth leads to solar and lunar eclipses and what happens during them.

## What is Chemistry?

CK-12
Updated:
Wednesday, August 3, 2016 - 9:12am
1 Comment
• Science
• High School
An introduction to chemistry with history, scientific method and areas of chemistry. The lesson contain information and assessment.

## Nuclear Power

CK-12
Updated:
Wednesday, September 21, 2016 - 9:06am
1 Comment
Students will learn how energy can be generated through nuclear reactions. Energy from nuclear power also has benefits and costs.

## Fraction Comparison with Lowest Common Denominator

CK-12
Updated:
Thursday, August 11, 2016 - 12:24am
1 Comment
• The Number System