Can scientists trace all humans back to a small region in Africa? An intriguing lesson turns back time to reveal artifacts leading scientists to believe human life originated in Africa and dispersed from there.

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...

Even the most inspiring documents in American history had to go through a few drafts before they were ready for publication. Reinforce the importance of the writing process, as well as the collaborative nature of democracy, with an...

Yes, Venn diagrams are helpful in science, too. Learners use an interactive to classify celestial bodies as having moons, as dwarf plants, as both, or as neither. They answer a set of challenge questions based on the Venn diagrams they...

Why is there more daylight in June than in December if you live above the equator? How does the angle of sunlight shift throughout the year? Answer these questions and more with an interactive article about the sun, its path through the...

How are scientists able to measure distances between stellar bodies? Turns out it's not very easy! Learners explore the process of trigonometric parallax as the method of determining these distances. They experience the same challenges...