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 89,491
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CK-12
Updated: 
2016
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  • Science
  • Middle School
Students learn about galaxies and the different types: spiral, elliptical, and irregular galaxies, as well as dwarf galaxies.
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Students learn about our galaxy, the Milky Way, the location of our solar system within it, and the supermassive black hole at its center.
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Students learn how the concept of a universe has changed, and how we currently understand it. Students also explore the scale of the Earth and our...
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Students will learn how red-shift of starlight indicates our universe is expanding.
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Students will learn about the Big Bang theory, which explains how our universe began, and what happened after the Big Bang.
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Students will learn about dark matter and dark energy, which make up most of the universe's mass and are impossible to directly observe.
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Students will learn how stars form. Stars emerge from a nebula, and have different life cycles depending on their size.
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Students learn about the part of star's lives called the main sequence, which classifies stars that are fusing hydrogen into helium.
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Student will explore the differences between red giant stars and white dwarf stars and learn when a star becomes a red giant or a white dwarf.
CK-12
Updated: 
2016
0 Comments
  • Science
  • Middle School
Students will learn the importance of supernovas and how a star becomes a supergiant. Supernova explosion fuse the heavier elements and blow them...