We keep seeing the "Black Lives Matter" slogan all around — what's it all about? Well, it's a long story. Here's part of the story in a nutshell.

Sigrid describes an object and gives you about 4 seconds to come up with the name of the object. Then she gives you the answer. Watch the video twice to see if you can come up with the answer on your own.

Are you ready to think fast again? You've got this! You get four seconds to come up with each answer. Then repeat the video to make sure you really know all the words!

See if you can figure out what Sigrid is describing. Don't worry! She will give you a little time to think and then give you the answer (with some extra information, too).

Try to guess what word Sigrid is describing using the clues she gives you. Remember: You can always click "pause" if you need more time!

This episode of "Think Fast" is dedicated to the summer and the heat. Try to guess what Sigrid is describing!

Get ready for another round of "Think Fast!" Sigrid will describe some objects and you have to figure out what each object is. Even if you don't know the word for it in English, you are still doing great if you can visualize the object being described.

Try to figure out what Sigrid is thinking of as she describes something. Understanding the description is just as important as guessing the answer.

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

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.

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.