Free Online English Lessons: Mustard
Why is some mustard hot and some not? Get the answers in this listening lesson.
Popcorn
Why did popcorn become a favorite snack in movie theaters? Why is popcorn so expensive? Get the answers in this listening lesson.
Gunpowder
Gunpowder helped to change history by making armies strong and empires rich. And it was because of an accident. Learn the history of gunpowder in this Level 5 listening lesson.
Lightning
Is lightning a line of electricity that shoots through the sky? Not really. Learn how lightning works in this Level 5 listening lesson.
Ballpoint Pen
Around the world, 57 ballpoint pens are purchased every second. How did this simple pen become so popular? Get the answer in this Level 5 listening lesson.
Galileo
Galileo was a scientist who wanted to understand the world with evidence and proof. Learn about his work and ideas in this Level 5 listening lesson.