Things on set didn’t always go as planned. Sometimes the young actors got the giggles, and sometimes they even got hurt, but each found their own way of dealing with the unexpected. Luckily, the director of the show was extremely patient with them.

In this lesson, we'll talk about the weather in the future. One way to express the future is with "going to": "It's going to rain." The second way is with "will": "It will rain." You will hear both in this video, so keep your eyes and ears open!

When the unexpected happened, it was sometimes best to stay in character and try to get a bigger laugh. In particular, Ashton Kutcher, who played Kelso on the show, was willing to endure some painful knocks if it made the audience happy.

Merve feels lucky to live in Kamloops, a small city in southwest Canada, and you can see why! It’s a beautiful place, surrounded by wilderness on all sides. Merve tells us about the area's mountains, grasslands, rivers and lakes, the gold rush of the late 19th century, and its wealth of fascinating wildlife.

On set, the decor had to be just right in reflecting the decade of the 1970s. Behind the scenes, detail was also important when props were in use. We meet the man who coordinated many of the stunts and gags, and then catch up with some of the big-name guest stars who graced the show over the years.

Let Sigrid tell you about the solar system that resolves around the Sun, including the order and characteristics of the planets within it. What is the closest planet to the Sun? What are the smallest and largest planets?

Cheryl teaches the iconic choreography from the music video for her song "Promise This," in particular focusing on the moves from the song's chorus.

The nation's first Youth Poet Laureate Amanda Gorman recites her poem "The Hill We Climb" at the inauguration ceremony for the 46th presidency of the United States of America. So many people were emotionally touched by this performance that we wanted to share it with our Yabla learners. It's a living example of contemporary American poetry and was part of a unique moment in American History.

Over the years, the show was blessed with many guest star appearances. Hollywood favorites like Bruce Willis, Lindsey Lohan, and Brooke Shields had a lot of fun working on set with the vibrant, enthusiastic cast.

Northeastern University is located in the U.S. city of Boston, where it gets quite cold in the winter! Find out what the students are planning for Valentine's Day weekend.

Luana and Austin get stuck in Indonesia when the borders close and their flight home from Bali is unexpectedly canceled. Austin calls the travel agency to ask for a refund, and the couple must act fast to make alternative arrangements. Luckily, they feel they can make the most of their situation.

Have you ever wondered what the rules of American Football are? Here's a quick guide.

Patrick Swayze answers questions about his experiences filming the movie To Wong Foo, Thanks for Everything! Julie Newmar, where he played the part of a New York City drag queen alongside co-stars Wesley Snipes and John Leguizamo. How did Patrick cope with high heels, and which guy was most comfortable as a woman?

How does a volcano actually form? This informative video on the topic is brought to you by National Geographic Kids!

Wilmer’s dressing room was closest to the studio and it served as a comfortable place for the cast members to hang out in between scenes. For Wilmer, it holds memories from the eight years of the show’s run, with his photo board and walls signed by cast and visitors alike.