Explore the library

See what your students will experience.

Pick a phenomenon and walk through it just like a student — read the passage, evaluate the CER, no account needed.

A Single Wave Appeared Out of Nowhere and Slammed Into an Oil Platform, Yet It Was Only Twice as Tall as the Other Waves

After a 15-Year War, About Half the Surviving Female Elephants in This Park Have No Tusks at All

Lightning Strikes This One Spot in Venezuela Almost Every Night — Around 28 Flashes a Minute, ~150 Nights a Year

Oklahoma Used to Get 2 Earthquakes a Year. Then Suddenly It Got 903

Satellite Photos Show Thousands of Cows Around the World All Standing the Same Direction, and Standing Under Power Lines Scrambles It

This Pumpkin Weighs More Than a Car, but the Same Seeds in Your Backyard Would Barely Fill a Wheelbarrow