Sigrid finishes the alphabet with "Z," covering words like "zone" and "zebra," but also the useful suffix "-ize."

Renowned kiteboard manufacturer Naish invites us to share in the adventure.

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

TJ and Tristan eat corn on the cob that's been cooked in a thermal pool and participate in a haka dance.

Have you ever wondered what an escalator looks like on the inside, or how it works? Here's a brief demonstration.

Annette recites a poem to help students with English pronunciation and its maddening inconsistencies.

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.

Annette provides some biographical notes on Maya Angelou and then recites her poem “Caged Bird." The poem followed Angelou's memoir volume, I Know Why the Caged Bird Sings.

Discover the story behind the latest Nespresso commercial, entitled "Change Nothing," which stars George Clooney and Ian McShane.

Russia is gearing up to host the 2018 World Cup. Sarah Rainsford and Steve Rosenberg, the BBC’s Moscow correspondents, take us on a tour of Sochi, Volgograd, and Saransk, where we can see the stadiums that have been constructed and get a sense of each town.

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

We continue our tour of Russian cities hosting the 2018 World Cup. We're taken to Kazan, Rostov, and Ekaterinburg.

The BBC reports on a floating wind turbine that could help provide power to remote communities. This helium-filled device is known as "the bat."

This video explores three more venues for the 2018 World Cup: Samara, St. Petersburg, and Kaliningrad. Aside from the arenas, Stalin's bunker, the Hermitage museum, and the beach are spotlighted attractions.

Here's a quick summary of the different kinds of words we have in the English language and what they are used for.