The universe is full of sources of energy. Explore the energy of pulsars with your classes through a simulation. An interactive lesson allows learners to manipulate the angle of rotation of both the earth and the pulsars. A real-time...

Why does it take Pluto 90,000 days to orbit the sun, but it only takes Mercury 88 days? An interactive lesson helps pupils find a connection between the speed of orbit and distance a planet is from the sun. The simulation allows for...

Many of the leading scientists in the world are studying climate change, and your learners can join in the discussion with a unit from the Will Steger Foundation. High schoolers work on eight lessons that focus on different aspect...

How hard do you need to throw a ball in the air so that it never returns? Scientists call this measure the escape velocity. Classes can explore this concept through an intriguing interactive lesson. Pupils adjust velocities and observe...

How does Mars move both eastward and westward in Earth's sky? A simple interactive describes the concept of retrograde motion using both color and graphic models. Learners understand that the speed of the orbit accounts for Mars' change...

Steel is a man-made alloy or a mixture of metals. Lesson 18 in this series of 36 focuses on metals and their extraction from Earth. Individuals read about, discuss, and answer questions after learning how people find most metals, the...

Give your classes a visual model of a rare phenomenon. Learners use an interactive activity to explore the connection of location, tilt, and size to the occurrence of an eclipse. Pupils consider both solar and lunar eclipses throughout...

View the moon changes from space while simultaneously experiencing the changes on Earth. A creative lesson allows pupils to view the big picture as they watch the orbit of the moon through a calendar period. At the same time, they see...