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Be a Biologist!
What can we learn from fossilized plants? What do biologists do as they study humans, plants, and animals? In this course, we’ll answer these questions and others as we learn about different types of biology, the study of living things, and the job requirements of various biologists.
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Grades 2-3

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Be an Environmental Scientist!
Why do animals adapt? What are the advantages of renewable energy? What do environmental scientists do? In this course, we’ll answer these questions and others as we learn about different types of environmental science and scientists who work in this expansive field.
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Grades 2-3

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Creating Fantasy Worlds
What makes a fantasy world feel real in a reader’s mind? How do writers draw and keep readers’ attention while crafting these mythical places? In this course, we will apply geography, cartography, and ...
Next session begins: September 10, 2025

Grades 5-6

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Creative Nonfiction
In this course, we will read short works of nonfiction, analyze published authors' techniques, and practice specific writing skills in a supportive community of our peers. We will learn how to select ...
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Grades 7-11

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Cryptology: Cracking Codes
Unlock the world of secret communication in this engaging, fast-paced introduction to cryptology. Over six weeks, during live weekly sessions with your classmates and instructor, we’ll explore how ...
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Grades 5-6

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CTY Reading Challenge
Calling all enthusiastic readers! Do you like talking about books almost as much as you like reading them? Join our 12-week reading challenge to meet other curious and motivated readers and talk about books. This course meets six times over 12 weeks and is guided by an instructor. Every two weeks, we’ll take up a new challenge: to select and read a book that satisfies the challenge category. In between meetings, we’ll engage in virtual discussions and prepare reviews on the book(s) we’ve read.
Next session begins: September 14, 2025

Grades 6-8

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Data and Chance
This is an Online course adapted from the On-Campus course Data and Chance. Your CTY friend teaches you a dice game. If you roll a 4, you win and the game ends. If your friend rolls a 5, they win and the game ends. You take turns rolling until one person wins. If you roll first, what is the probability you will win? This course explores probability and statistics, two areas of mathematics that easily transfer from the classroom to the real world.
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Grades 5-6

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Everyday Science
What can a bucket of water or lounging beneath a shade tree teach you about science? Archimedes discovered the principle of buoyancy in a bathtub, and Newton allegedly discovered gravity while sitting ...
Next session begins: September 14, 2025

Grades 2-3

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Game Theory and Strategy
Humans tend to make decisions based on emotions, rather than using cold, hard math—but when we learn to use strategy in decision-making, we can make more rational choices, minimize biases, and achieve ...
Next session begins: September 10, 2025

Grades 7-11

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Geometry and Spatial Sense
Geometric and spatial reasoning skills are essential for living in and making sense of the world. Everything from solving a jigsaw puzzle to arranging furniture to efficiently packing a suitcase ...
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Grades 3-4

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Global Mythologies: Greece and Rome
Ancient Romans adopted and adapted Greek stories, and, over centuries of expansion, carried them to peoples and cultures across Europe and around the Mediterranean. Greco-Roman mythology still ...
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Grades 4-5

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Gross Science: Microorganisms
The human body is amazing— and sometimes, gross. From the blood inside us to the gas that comes out, each slimy, gunky, or smelly part has a vital role to play in keeping us healthy. In this three ...
Next session begins: September 9, 2025

Grades 3-4

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Inventions: Catapults
Did you know the idea for the microwave started with a candy bar? Inventor Percy Spencer was standing in front of a magnetron when he noticed his chocolate treat was melting in his pocket. When ...
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Grades 3-4

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Kitchen Chemistry
What is matter, why does it matter, and how does it change? Discover the role that chemistry plays in our everyday lives, particularly in the kitchen. In this six-week course, through hands-on ...
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Grades 4-5

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Literary Worldbuilding
Fictional worlds often stay with us even longer than the stories that are set within them. They can be havens or nightmares, futuristic glimpses of what our world could be, or looking-glass critiques ...
Next session begins: September 10, 2025

Grades 7-11

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Logic and Proofs: Fundamentals
Through engaging symbolic logic puzzles, Sudoku challenges, thought-provoking problems, and real-world applications, this course introduces advanced mathematical concepts that challenge the mind ...
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Grades 7-8

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Math Meets Logic: Discovering Proofs
Reasoning, logic, and critical thinking are the building blocks of intellectual inquiry. In this course, we’ll focus on developing these skills as you are introduced to the idea of mathematical proofs ...
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Grades 5-6

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Mathematics of Movie Magic
How do filmmakers transform basic geometric shapes into your favorite animated characters? How are animators able to portray those characters moving smoothly across the screen? How might an animator ...
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Grades 4-5

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Mystery Writers Wanted
For generations, great mysteries have captivated readers with compelling characters and suspenseful storytelling punctuated by intriguing, unconventional sleuths like Eve Titus’s Basil of Baker Street ...
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Grades 3-4

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Numbers: Zero to Infinity
What does a subatomic particle measured in femtometers have in common with a galaxy measured in light years? Both are a part of the unique human effort to quantify the world around us. In this course ...
Next session begins: September 9, 2025

Grades 4-5

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Planning for Life on Mars
For decades, scientists have looked to Mars as an untapped resource, one that possibly holds clues to the origins of the solar system as well as the potential for future colonization. Numerous ...
Next session begins: September 10, 2025

Grades 4-5

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Predicting Pandemics
When the threat of pandemic looms, all eyes turn to the experts. Each outbreak is unique and raises different concerns; in providing answers, infectious diseases specialists rely on data and accurate ...
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Grades 7-11

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Sports Statistics
Dive into the world of sports statistics by using real-world examples to better understand how numbers tell a story and how they can help lead to a win. In this course, we'll uncover patterns by ...
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Grades 7-11

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Storytelling Through Film
Film, photography, and video games are all popular modes of visual storytelling that are used to express an idea, theme, or story in today’s digital world. In this three-week mini course, we’ll ...
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Grades 6-8

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The Ancient World: Ancient Egypt
Between 3000 BCE and 500 CE, influential civilizations left lasting legacies that continue to shape our world today. In this course, we'll focus specifically on Ancient Egypt, exploring its distinctive geography, daily life, social structures, government, economy, and religion.
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Grades 3-4

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The Art of Game Design
Delve into the world of games—how they work, why people play them, and the elements that make them popular. In this course, we’ll have fun playing board games, digital games, and card games, while ...
Next session begins: September 10, 2025

Grades 7-11

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The Mathematics of Game Shows
Step right up and try your hand at solving some of the world’s classic math conundrums! We have options galore: Plinko, Press Your Luck, Deal, or No Deal Island, and many more. Pull the curtain back ...
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Grades 5-6

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The Mathematics of Money
Have you ever wondered why round-trip fares between cities vary, or how changes in interest rates impact the real estate market? Discover how mathematics influences everyday financial decisions in ...
Next session begins: September 9, 2025

Grades 7-10

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The Mystery of Memory
Why are some things easier to remember than others? Why do people have vastly different memories of the same event? Why do most people remember Darth Vader saying, “Luke, I am your father,” when what ...
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Grades 7-11

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The Physics of Sports
This is an Online course adapted from the On-Campus course The Physics of Sports. Ever wondered how a baseball curves mid-pitch or why an ice skater spins faster by pulling in their arms? Curious about how LeBron James makes those incredible slam dunks and precise three-pointers? Physics is the key to unlocking these and other intriguing sports phenomena. In this course, we'll delve into the mechanics of sports, exploring concepts such as kinematics, dynamics, momentum, energy, and power.
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Grades 7-10

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The Way to Win: An Introduction to Game Theory
Mathematicians have studied games for over a century. How do they analyze them? In this course, we’ll learn combinatorial game theory pertaining to games of perfect information, such as Go and chess. In these games, there are no dice or hidden cards; all game information is known to players except their individual strategies.
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Grades 6-8

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Writing and Imagination
Imaginative writing is a powerful tool—one that allows us to create worlds, spark emotions, and inspire new ways of thinking. As writers, our words can make someone laugh, shift their perspective, or ...
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Grades 5-6

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Young Readers Series: Amazing Animals
How and why do people bond with animals? How do human-companion animal relationships differ by culture? In this course, we’ll read books that explore human relationships with domestic and domesticated ...
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Grades 2-3

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