Has your doctor ever asked you to stick out your tongue and say "ah"? They're probably checking out your tonsils! But what are your tonsils, and what do they do?

Mister Brown and Squeaks decide to design a solar oven, so they can cook their lunch while they play outside!

In which John Green teaches you about Nationalism. Nationalism was everywhere in the 19th century, as people all over the world carved new nation-states out of old empires. Nationalist leaders changed the way people thought of themselves...

Squeaks built a pretend time machine, and he and Mister Brown use their imaginations to travel back in time to learn all about the very first living thing!



Second Grade Next Generation Science
Standards
Disciplin
ary...

In which John Green teaches you about founding father and third president of the United States, Thomas Jefferson. Jefferson is a somewhat controversial figure in American history, largely because he, like pretty much all humans, was a...

This video is brought to you by the Child and Teen Checkups program of the Minnesota Department of Health.

Jessi and Squeaks love to build things, and they love to learn how to make the things they build even better! Join them today to learn how engineering can help make anything, from a tower of cups to a giant sky scraper, more stable!

Jessi and Squeaks explore our home galaxy, The Milky Way!

Clouds can look like castles made of cotton candy, or they can be thin and wispy. But have you ever wondered what clouds actually are?

So we've talked a lot in this series about how computers fetch and display data, but how do they make decisions on this data? From spam filters and self-driving cars, to cutting edge medical diagnosis and real-time language translation,...

Squeaks wants to know more about the biggest flower in the world! So Mister Brown teaches him all about this stinky, weird plant - called Rafflesia arnoldii!



Disciplinary
Core Idea:
LS2.A: Interdependent Relationships...

There are all sorts of flying birds, but some of the world's biggest are ones that stick to the ground, like the awesome ostrich!

Have you ever tried to write or color with both hands at the same time? It seems like it would save a ton of time, right? But for most people, one of their hands is way better at drawing or writing than the other!

Sloths might be slow and spend much of their time sleeping, but they’re definitely not boring. Jessi shares three weird facts about sloths!

Whether you're out camping, cooking, or snuggled up in front of your fireplace, you know that fire is hot! But why? Join Jessi and Squeaks to learn how fires turn wood or other fuel into useful heat!

Find out what makes stars what they are, and take a tour of some of the most extreme stars in space!

Learn how to make a great paper airplane, and find out what makes it fly!

Composting is a way to turn scraps of food you aren't going to eat anymore into healthy soil for your garden! But how does food turn in to dirt?! Mister Brown and Squeaks take a trip to SoilCycle, a place that makes compost in...

In which John Green teaches you about the post-World War II breakup of most of the European empires. As you'll remember from previous installments of Crash Course, Europeans spent several centuries sailing around the world creating...

Would you like to spend all day thinking about dinosaurs? Well, some scientists do! Find out all about what it means to be a paleontologist!

In which John Green teaches you about the tumultuous 2000's in the United States of America, mainly the 2000's that coincide with the presidency of George W Bush. From the controversial election in 2000, to the events of 9/11 and Bush's...

If you're ticklish, you know that you can't stop from laughing and wiggling around when you get tickled! But why does your body react this way, and why can't you stop it? Jessi's here to fill you in!

Sam the Bat is visiting today, and Jessi wants to use a cool trick to show him how we use a special part of our body to sing.

When you think about it, your eyebrows are a little strange! But they're also really important! From protecting your eyes to helping others know how you feel, those little bits of hair in the middle of your face have some big jobs!