Fuse School: Learn the basics about the effects of global warming on the environment. Some of the problems global warming may cause are changing climate, extremes of weather, problems for ecosystems, rising sea levels, and ocean acidification.

"T" is for "tricky." Depending on what letters "T" is combined with or next to, it is pronounced differently. Sigrid explains and gives some examples.

"U" is an interesting vowel, and has a few different sounds. It can even sound like the consonant "Y," and combines with other vowels to make new sounds.

"V" is a voiced consonant. "Voice" starts with "V." We make the sound with the upper teeth lightly touching the lower lip, like "F" but with the voice, too. It vibrates. The verb "to vibrate" also starts with "V." That should make it easy to remember.

"W" is a consonant, but it is very vowel-like and is considered a "semi-vowel." "W" is featured in plenty of important words, and it combines with other letters to make some new sounds.

"X" is a special letter in that we often use it by itself. It's useful in a lot of situations. In the middle of a word, however, it can be pronounced in a few different ways.

Do you want to prepare for that big job interview? If so, take a look. Gabrielle offers some valuable information and a few helpful hints.

Gabrielle presents three key questions you're likely to face when being interviewed for a job. Her advice is spot on.

"Y" is a tricky letter because it's both a consonant and a vowel. As a vowel, it has different sounds. Don't worry. But hey, maybe keep your eye on the "Y." Don't let it fly away.

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

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

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

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.

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