In American schools, it's common for kids to have to learn the Preamble to the United States Constitution by heart. This song, from Schoolhouse Rock, is meant to give these kids a hand, even though it is a slightly abridged version.

Here are some words to help answer the question "Which one?" We distinguish between singular and plural as well as between something close to us and far away.

This song was written and sung by Bob Dorough. It teaches about the multiplication of 5 through a game of hide and seek, in which the seeker counts by fives.

Why are some rock formations and animals found on more than one continent? The explanation dates back to the Ice Age.

Why do some of the national parks in the United States resemble the European Alps? Geologist Dr. Robert Darga answers this question.

When an invitation arrives for the previous occupant of Ted's apartment, the gang decides to attend the event in her place.

Bob Dorough wrote and sang this song about the number "three," as a fun way for kids to learn their multiplication tables. It became the pilot episode for Multiplication Rock, the first season of the Schoolhouse Rock TV series.

Nouns are usually the first words we learn. The good news is that with nouns, we don't have to worry about gender in English. We do, however, have to be aware of gerunds that act like nouns but look like verbs, and countable or uncountable nouns.

The fire that was set to smoke Jack out of the jungle has an unintended consequence—and a happy one at that.

Alan and his son Jake discuss the merits of going to college in this extended preview of an episode of the popular sitcom Two and a Half Men.

Maggie decides to intervene, and finally the girls are encouraged to stop sulking and talk about their issues.

It turns out that Rachael is also unhappy, and Maggie is feeling more and more uncomfortable about being in the middle of things.

Living together can be challenging, even for good friends. Maggie, as a guest and friend, can't help but notice that Julia is feeling frustrated about something.

Anna, from Cambridge University Press, explains how and when to use the Present Simple.

The British band Madness had a major UK hit with this song, and with good reason: heartfelt and nutty in equal measure, it would bring the house down at every Madness show. The video — filmed above and below water — is one of their classics, with cameo appearances by Big Bird, a killer whale, and Labi Siffre, who wrote the song.