Considering how massive our universe is, we know the distances to cosmic objects surprisingly well. What tools and clues do scientists use to measure distances that are so enormous they sound like made-up numbers?

The path to skill around the globe has been the same for thousands of years: train under an expert and take on small, easy tasks before progressing to riskier, harder ones. But right now, we're handling AI in a way that blocks that path...

Learn about the geography of the country of Saudi Arabia!

In this online lesson, Pamela tells an intermediate level Spanish story about doing household tasks. She narrates the story in the past tenses, so you'll learn preterite verbs, imperfect verbs and house vocabulary as well as a variety of...

Learn Spanish family vocabulary by listening to Juan and Pamela's conversation. Juan explains who his family members are and talks about who is coming to a gathering at his house. In this video, you will learn lots of useful Spanish...

Learn Spanish days of the week by listening to Juan and Pamela's conversation about their schedules for the week. Listen as they try to find a time to get together and compare their activities for each weekday. You will hear days, times...

Learn Spanish adjectives with ser and estar, as well as family vocabulary, by listening to Juan and Pamela talk about a sign Pamela is making. Pamela is drawing her relatives for a sign for a party. You will learn lots of useful Spanish...

Learn the Spanish rooms of the house by listening to Juan and Pamela's conversation about Pamela's new apartment. She uses house and room vocabulary in context to describe the floor plan. In this video, you will learn lots of useful...

Learn sports vocabulary in Spanish with this online lesson as you listen to Juan and Pamela talk about a collection of sports equipment. Students learn Spanish words to talk about different sports and equipment, as well as lots of useful...

Pamela tells a Spanish story about getting ready for a trip. She narrates the story in the past tenses, so you'll learn Spanish preterite and imperfect verbs. In addition to travel, the story focuses on telling time in Spanish and...

In these Spanish stories intermediate level, Juan tells a story about getting ready to go to the beach. He narrates the story in the past tense in this video. In this story you'll learn Spanish past tense verbs and vocabulary for beach...

Learn Spanish travel vocabulary by listening as Juan and Pamela talk about recent trips they have taken. We all have conversations about travel and in this video you will learn lots of useful Spanish vocabulary related to trips.

Learn the Spanish verb tener in different tenses by listening as Juan and Pamela use tener in the present, past, future and perfect conjugations. The verb tener means "to have" and is one of the most important verbs for communicating in...

Learn Spanish weather and clothes vocabulary by listening to Juan and Pamela's conversation as Juan is leaving the house. He's dressed for cold, but is that the right clothing for a sunny day? In this video, you will learn lots of useful...

Pamela tells a Spanish story about driving to Juan's house. She narrates the story in the present tense, so you'll learn Spanish present tense verbs as well as common driving, car and road vocabulary. In addition to driving, the story...

Pamela tells a Spanish story about getting ready for a trip. She narrates the story in the present tense, so you'll learn Spanish present tense verbs. In addition to travel, the story focuses on telling time in Spanish and vocabulary for...

Pamela tells a Spanish story about driving to Juan's house. She narrates the story in the past tense, so you'll learn Spanish imperfect and preterite tense verbs as well as common driving, car and road vocabulary. In addition to driving,...

In this Spanish story, Juan tells about going to his parent's house and having a problem when he gets there. He narrates the story in the past tense, so you'll hear the preterite and imperfect tenses of common verbs. You'll also hear...

In this online lesson, Pamela tells an intermediate level Spanish story about doing household tasks. She narrates the story in the present tense, so you'll learn Spanish present tense verbs and house vocabulary as well as a variety of...

In these Spanish stories intermediate level, Juan tells a story about getting ready to go to the beach. He narrates the story in the present tense and then in the past tense in our next video. In this story, you'll learn Spanish present...

Learn about Monarch butterflies in Spanish by listening to Juan and Pamela's conversation about these amazing creatures. Pamela and Juan share information about the life cycle and migration of the Monarch butterflies. In this video, you...

Learn Spanish numbers by listening to Juan and Pamela's conversation. Juan uses Spanish numbers in context to explain why he has gotten home late. In this video, you will also learn lots of useful Spanish vocabulary for addresses, time,...

Learn Spanish weather vocabulary by listening as Juan and Pamela talk about weather, climate and what kind of weather conditions they like. We all have conversations about the weather, and in this video, you will learn lots of useful...

Learn Spanish present tense verbs with this story about a dance contest. Juan tells Pamela about his experience the night before. He narrates the story in the present tense, so you'll learn Spanish verbs as well as vocabulary for...