Both the Mississippi River and the Colorado River have a huge impact on the lives of millions of Americans. While there have been severe droughts leading to a lack of drinking water, there have also been floods because of quickly melting snow.

It's been a stormy and fiery year in the United States, both weather-wise and in the government.

What's the difference between "clean" and "dirty" energy? Sigrid reports on different kinds of energy and discusses trends in heating our homes.

A first for the United States: A jury found a former president guilty of a serious crime in New York. Here are some details and plenty of new words to learn!

Ever wondered why most Americans don't like tea? Have they ever even tasted a cup of tea properly prepared? Simon Jones is convinced that they haven't and gives a nice detailed description, taken from "The Hitchhiker's Guide to the Galaxy," of how to make a proper cup of tea. Enjoy!

Sigrid explains three ways to talk about the future and tells us about some of her new year's resolutions.

Sigrid explains what a limerick is, and how to write one. If you are so inclined, you can submit your limericks in the "comments" section of the video tab.

Sigrid has more fun with limericks, attempting to sing one, and dedicating another limerick to her boss. She offers a final limerick from Edward Lear, the king of limericks. See Part 1 for instructions on how limericks work and how to write one.

The letter "G" often combines with "N" to make a special sound. Sigrid explains how this works.

Sigrid explains what cardinal numbers are and gives us some writing and pronunciation tips.

Ordinal numbers help us put things in order or in a sequence. Sigrid teaches us the suffixes we use to turn cardinal numbers into ordinal ones.

Dates are usually expressed with ordinal numbers. Sometimes, though, what we write is different from what we say.

Nursery rhymes are for children. The rhyme about Humpty Dumpty, however, is so famous that it's been used in literary and cinematic contexts as well.

We have a look inside the story of The Ugly Duckling to see how the verbs work. First on the list is the past continuous tense.

Sigrid looks at the regular and irregular verbs in part one of her rendition of The Ugly Duckling. As you listen, you can pause whenever necessary in order to practice the pronunciation of the conjugated verbs.