What causes Earth's surface to change? Mountains move! And there are ocean fossils on top of Mt. Everest! In this plate tectonics and rock cycling unit, students come to see that the Earth is much more active and alive than they have thought before. The unit launches with documentation of a 2015 Himalayan earthquake that shifted Mt. Everest suddenly to the southwest direction. Students also discover that Mt. Everest is steadily moving to the northeast every year and getting taller as well. Students wonder what could cause an entire mountain to move during an earthquake.

OpenSciEd content is highly rated in EdReports and is aligned to NGSS standards.

In this feature, adapted from Interactive NOVA: Earth, students explore the relationship between oxygen concentration and the well-being of various organisms by simulating a change in oxygen levels and observing what happens.

The Atomic Archive indexes a variety of downloadable and viewable videos which are present at the site. Some videos are have virtual reality feature, allowing the visitor to rotated and explore features an object (e.g., a bomb).

In the following video Paul Andersen defines impulse as the product of the force applied and the time over which the force is applied. The impulse of an object is equivalent to the change in momentum of the object. [9:11]

The seven major economic indicators for the U.S. economy are listed here in an easy to read chart. The seven indicators are unemployment rate, change in hourly employment, average hourly earnings, consumer price index, producer price index, U.S. import price index, employment cost index and productivity.

This digital textbook covers core chemistry concepts and includes interactive features, real-world examples, and videos.

A free CK-12 account is required to view all materials.

In this lesson, students see how to convert from a decimal to a fraction. It is 1 of 16 in the series titled "Converting Decimals to Fractions." [2:19]

In this lesson, students see how to convert from a decimal to a fraction. It is 10 of 16 in the series titled "Converting Decimals to Fractions." [2:26]

In this lesson, students see how to convert from a decimal to a fraction. It is 11 of 16 in the series titled "Converting Decimals to Fractions." [2:46]

In this lesson, students see how to convert from a decimal to a fraction. It is 5 of 16 in the series titled "Converting Decimals to Fractions." [1:41]

This lesson [1:27] demonstrates conversion from fractions to decimals. It is 1 of 14 in the series titled "Converting Fractions to Decimals."

This lesson demonstrates conversion from fractions to decimals. It is 10 of 14 in the series titled "Converting Fractions to Decimals." [0:46]

This lesson [2:04] demonstrates conversion from fractions to decimals. It is 13 of 14 in the series titled "Converting Fractions to Decimals."

This lesson [1:06] demonstrates conversion from fractions to decimals. It is 2 of 14 in the series titled "Converting Fractions to Decimals."

This lesson [3:01] demonstrates conversion from fractions to decimals. It is 5 of 14 in the series titled "Converting Fractions to Decimals."

Do Something is a nationwide network of young people who know they can make a difference in their communities and take action to change the world around them. As part of Do Something, young people are asked what they want to do to make things better and then given the resources and support to bring their unique vision to life.

Describes some factors that lead to long-term climate changes.

A free CK-12 account is required to view all materials.

Looks at how El Nino and La Nina affect the climate.

A free CK-12 account is required to view all materials.

The 12th grade learning experience consists of 7 mostly month-long units aligned to the Common Core State Standards, with available course material for teachers and students easily accessible online. Over the course of the year there is a steady progression in text complexity levels, sophistication of writing tasks, speaking and listening activities, and increased opportunities for independent and collaborative work. Rubrics and student models accompany many writing assignments.Throughout the 12th grade year, in addition to the Common Read texts that the whole class reads together, students each select an Independent Reading book and engage with peers in group Book Talks. Language study is embedded in every 12th grade unit as students use annotation to closely review aspects of each text. Teacher resources provide additional materials to support each unit.