There is a lot of talk about how 3D printing could revolutionize the way that we make stuff. But what is 3D printing and how does 3D printing allow us to make almost anything from nothing? Professor Tim Minshall, Head of the Institute for Manufacturing at the University of Cambridge, explains it in this video, which is targeted at school-age students.

Catch up on winter vocabulary with Sigrid. It's also a great chance to practice words with "W," since there are plenty associated with winter.

Spring has finally sprung! It’s time to shed a few layers of clothing and enjoy the spring sun.

Do you know how to say the colors in English? What is the difference between a primary and secondary color? Learn all about them with Luana.

Let's learn the names of various kitchen utensils with Luana! We'll start with the utensils used to prepare and cook food, such as tongs, sifters, graters, knives, cutting boards, pots and pans...

In the second part of this lesson, Luana goes through the kitchen items we use to serve and eat our food, and explains how and when they are used.

In this video lesson, Luana explains the names given in English to our nearest and dearest relations: the brothers, sisters, cousins, parents, uncles and aunts that make up our family tree.

Luana guides us through some of the most common questions asked at job interviews, and gives us useful tips on how we might answer them, if we want to get that job!

In this video lesson, Luana has advice for avoiding arguments and fights, how to resolve them calmly and peacefully, and if necessary, express our apologies.

Rachel's English: For some people, "s" and "sh" sound the same. As Rachel explains, the positions for these two sounds are quite different. Learn the difference in tongue and lip position, and practice with minimal pairs.

Here are some verbs that are handy when plans change. This segment features "to postpone," "to delay," "to procrastinate," and "to put off."

Here is one more verb to use when you want to avoid giving an answer: "to stall." Sigrid then sums up and gives you some tips for remembering all of the related verbs from both segments of this video.

Now we'll look at some verbs and phrasal verbs that use imagery to talk about plans and timetables that change. This segment is about "to shelve," "to put on ice," "to put on hold," and "to hold off."

This final segment is about two fun expressions: "to kick the can down the road" and the currently popular expression, "Delay, delay, delay." Then Sigrid sums up parts 3 and 4.

In this video, Austin shows budding guitarists an exercise to increase the accuracy and dexterity of their fingers as they move across the guitar frets. The chords appear relatively simple, but Austin assures us that it’s not as easy as he makes it look!