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Chess Club
Welcome to the club! In CTY’s Chess Club, students who enjoy playing the game come together to practice their chess tactics and strategies in a community setting. Through forum discussion and the ...
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Grades 4-12

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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 ...
Next session begins: September 9, 2025

Grades 5-6

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Cryptology: Math and Codes
Make and break secret codes in this exciting introductory cryptology course. You’ll begin with simple Caesar ciphers, learning to encrypt and decrypt messages as well as the history behind the cipher ...

Grades 5-7

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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.
Next session begins: June 16, 2025

Grades 5-6

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Disease Modeling
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 ...
Next session begins: June 16, 2025

Grades 7-10

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Excursions in Pre-algebra
Explore how mathematics relates to food, art, and history in this interactive pre-algebra course. Through weekly meetings, collaborative activities, and hands-on projects, you’ll sharpen your ...
Next start date: September 8, 2025

Grades 6-9

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Game Design
What counts as a game? What are games made of? How are successful games designed and built? Read theory that orients you to how games work, why people play them, and what makes a good game. Play ...
Next session begins: June 16, 2025

Grades 7-10

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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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Geometric and Spatial Reasoning
Geometric and spatial reasoning skills are essential for living in and making sense of the world around us. Everything from solving a jigsaw puzzle to arranging furniture to efficiently packing a bag ...
Next session begins: June 16, 2025

Grades 3-4

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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 ...
Next session begins: September 8, 2025

Grades 3-4

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High School Competitive Math Club
Want to solve problems and learn strategies with other kids who love competitive math? Then welcome to the club! Through weekly meetings and asynchronous forum discussion, you’ll work with a small ...
Next start date: June 16, 2025

Grades 7-12

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Honors Algebra I
Explore variables, expressions, and linear, exponential, and quadratic function applications in this full-length online Honors Algebra I course. We’ll use modeling and real-life scenarios to extend ...

Grades 6-9

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Honors Algebra II
This full-length online Honors Algebra II course expands upon topics introduced in Algebra I to teach you how to manipulate and apply more advanced functions and operations to polynomials, radicals ...

Grades 7-11

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Honors Geometry
This course covers concepts typically offered in a full-year honors geometry course. You’ll explore geometric proofs, triangle relationships, transformations, right triangle trigonometry, circles ...

Grades 6-11

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Honors Grade 3 Mathematics
This course covers a full-year honors curriculum, aligned with the Common Core State Standards, to prepare students for success in grade 4 mathematics. We’ll start by reviewing grade 2 concepts and ...

Grades 2-3

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Honors Grade 4 Mathematics
Tackle lessons typically offered in a full year of honors math curriculum in this intensive course that offers a review of Grade 3 topics and prepares you for Grade 5 mathematics. Engage with videos ...

Grades 2-4

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Honors Grade 5 Mathematics
Tackle a full year of honors mathematics with this Grade 5 curriculum that will set you up for success in Grade 6 honors math. You’ll begin by reviewing concepts such as algebraic variables and ...

Grades 3-5

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Honors Grade 6 Mathematics
Tackle a full year of honors mathematics with this Grade 6 curriculum that will set you up for success with Honors Pre-Algebra. In this course, students will be introduced to the theory and ...

Grades 4-6

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Honors Grade 7 Mathematics
This full-year, Common Core-aligned course explores proportional relationships, statistical sampling, linear expressions and equations, and two- and three-dimensional geometry. You’ll grow comfortable ...

Grades 5-7

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Honors Grade 8 Mathematics
This full-year Common Core-aligned course focuses on the study of algebraic manipulation and graphical interpretations as you cover topics taught in preparation for Honors Algebra I. You’ll grow ...

Grades 6-8

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Intermediate Chess
In Intermediate Chess, you will expand your knowledge of tactics and strategies in the game of chess. Starting with opening goals, you will learn tactical motifs and strategies to employ through a ...
Next start date: June 16, 2025

Grades 4-12

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Introduction to Abstract Mathematics
Construct logical arguments as a proof to verify mathematical statements in this college-level course that follows Multivariable Calculus and builds upon Linear Algebra. Techniques and methods of ...

Grades 10-12

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Introduction to Chess
Introduction to Chess provides new or beginning students with a strong foundation in the game’s rules and strategies, and a community of enthusiasts to learn alongside. You’ll begin with a brief ...
Next start date: June 16, 2025

Grades 3-8

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Introduction to Complex Analysis
This course will introduce you to the theory of functions of a complex variable—a core area of mathematics. We will also cover complex numbers and their properties, analytic functions and the Cauchy ...

Grades 10-12

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Introduction to Logic and Proofs
Explore advanced mathematical concepts in fun and interesting ways and build a strong foundation for high school, computer science, and college-level logic coursework in this introductory logic class ...
Next start date: June 16, 2025

Grades 7-12

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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 ...
Next session begins: September 10, 2025

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 ...
Next session begins: September 8, 2025

Grades 5-6

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Mathematical Proofs
Reasoning, logic, and critical thinking are the building blocks of intellectual inquiry. Focus on developing these skills through problem-solving and exposure to a wide range of topics in mathematics ...
Next session begins: June 16, 2025

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 ...
Next session begins: September 8, 2025

Grades 4-5

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Mathematics of Pixar
Learn how digital artists animate the mouth of a Toy Story character by manipulating a single point on a polygon, or how combinations are applied to turn three unique robot designs into 3,000 ...
Next session begins: June 16, 2025

Grades 4-5

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Modern Cryptography
In the age of digital surveillance, apps boasting end-to-end encryption such as WhatsApp and Telegram have flourished. What are these tools, and how do they work? How have developments in modern ...
Next session begins: June 16, 2025

Grades 7-10

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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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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 ...
Next session begins: September 10, 2025

Grades 7-11

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Problem Solving Strategies
Develop strategies for solving a wide variety of word problems using resources from Ken Johnson and Ted Herr’s Problem Solving Strategies: Crossing the River with Dogs and Other Mathematical ...
Next session begins: June 16, 2025

Grades 4-5

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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 ...
Next session begins: September 10, 2025

Grades 7-11

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Statistical Reasoning in Sports
In football, does the home team really have an advantage? Does dribbling the basketball before shooting a free throw increase the odds of scoring? Where should a goalie stand to block the most penalty ...
Next session begins: June 16, 2025

Grades 7-10

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Survey of Cryptography
Surveil the world of cryptography, the science of secret-keeping. From passing notes in class to keeping online banking transactions secure, the need for confidential communication has been present ...
Next session begins: July 14, 2025

Grades 7-10

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Taking a Chance: 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, Golden Balls, Deal or No Deal, and many more. Pull the curtain back on the ...
Next session begins: June 16, 2025

Grades 5-6

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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 ...
Next session begins: September 10, 2025

Grades 5-6

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