## 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.

Lessons 668
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## Least Common Multiple

CK-12
Updated:
2016
1 Comment
• Math
• 3-5, MS
Students learn to find the least common multiple of a given pair of numbers using lists.

## Decimal Multiplication

CK-12
Updated:
2016
1 Comment
• Math
• 3-5, MS
Students learn how to find the product of two decimals by multiplying vertically and correctly placing the decimal point.

## Multiplication of Decimals

CK-12
Updated:
2016
0 Comments
• Math
• 3-5, MS
Here you'll learn how to figure out where to put the decimal point in a product when you multiply decimals. You will also find the product of two...

## Earth's Shape

CK-12
Updated:
2017
0 Comments
• Science
• 3-5, MS
Students will learn about Earth's shape (which people have known is round for millennia) and its magnetic field.

## Earth's Magnetic Field

CK-12
Updated:
2016
0 Comments
• 3-5, MS
Students will learn how the magnetic field is like a bar magnet inside Earth: Sometimes, the magnetic field can flip.

## Revolutions of the Earth

CK-12
Updated:
2016
0 Comments
• Science
• 3-5, MS
Students will learn how Earth, and the other seven planets, revolve around the Sun in an orbit that is slightly elliptical.

## Coriolis Effect

CK-12
Updated:
2017
0 Comments
• Science
• 3-5, MS
Students will learn about the Coriolis Effect, which describes how Earth's rotation helps to determine the directions of air and water currents.

## All About Seasons

CK-12
Updated:
2016
0 Comments
• 3-5, MS
Students will learn that the four seasons are the result of Earth's axial tilt. The will also learn about solstices and equinoxes.

## Lunar Phases

CK-12
Updated:
2017
0 Comments
• Science
• 3-5, MS
Students will learn the names of the lunar phases, which are caused by the Earth's shadow.

## Earth's Interior

CK-12
Updated:
2016
0 Comments
• 3-5, MS
Students will explore how scientists investigate Earth's interior using seismic waves, meteorites, density and the magnetic field. Students will also...