Wedges, pulleys, and levers—oh my! These ancient tools are still hard at work making life easier, from building pyramids to launching marshmallows across your classroom.

Assertiveness is the superpower of speaking up with strength and kindness. It’s not about being a pushover or a bulldozer—it’s about using your voice to protect your needs and your relationships.

The U.S. Constitution divides power among three branches—legislative, executive, and judicial—to prevent tyranny and keep government balanced.