Courses to engage and inspire

MathematicsX
60 Courses

Chess Club

Grades 4–12

Mathematics

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...
Next Start Date: Jan 26, 2026
Modality
Online
Identification Level
Quantitative - CTY-Level
Verbal - CTY-Level

Cryptology

Grades 7–11

Mathematics

Cryptology is the study of the codes and ciphers used to create secret writing. This math course explores many early techniques in cryptology, such as cipher wheels, the Caesar shift, polyalphabetic...
Modality

No sections are open for enrollment at this time.
Please check back later.

Identification Level
Quantitative - Advanced CTY-Level

Cryptology: Cracking Codes

Grades 5–6

Mathematics

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...
Modality

No sections are open for enrollment at this time.
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Identification Level
Quantitative - CTY-Level

Cryptology: Math and Codes

Grades 5–7

Mathematics

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...
Modality

No sections are open for enrollment at this time.
Please check back later.

Identification Level
Quantitative - CTY-Level

Data and Chance

Grades 5–6

Mathematics

Your new friend at CTY 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...
Modality

No sections are open for enrollment at this time.
Please check back later.

Identification Level
Quantitative - CTY-Level

Data and Chance

Grades 5–6

Mathematics

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...
Modality

No sections are open for enrollment at this time.
Please check back later.

Identification Level
Quantitative - CTY-Level

Decoding Our World

Grades 3–4

Language Arts, Mathematics, Science and Engineering

How do we see, perceive, and describe the world around us? We can use mathematics to measure, calculate, and find patterns. We can use technology to expand what we see and observe. And we can tell...
Modality

No sections are open for enrollment at this time.
Please check back later.

Identification Level
Quantitative - Emerging
Verbal - Emerging

Economic Chaos: Understanding Volatile Markets

Grades 7–11

Mathematics

What does it mean when bubbles burst, stock markets crash, and hyperinflation takes off? How do these major economic events affect businesses and individuals around the world? COVID-19 was one such...
Next Start Date: Jan 28, 2026 + 1 more dates
Modality
Online
Identification Level
Quantitative - CTY-Level

Elementary School Competitive Mathematics

Grades 3–7

Mathematics

Strengthen your analytical and problem-solving skills in this challenging course designed for students with little to no previous math competition experience. You'll learn 12 different problem-solving...
Modality

No sections are open for enrollment at this time.
Please check back later.

Identification Level
Quantitative - CTY-Level

Excursions in Pre-algebra

Grades 6–9

Mathematics

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: Jan 26, 2026 + 1 more dates
Modality
Online
Identification Level
Quantitative - CTY-Level

Fundamentals of Microeconomics

Grades 7–11

Mathematics

How much are you willing to pay for ice cream on a hot summer day? Who is responsible for the cost of pollution? Is there such a thing as a perfectly competitive market? Microeconomics provides...
Modality

No sections are open for enrollment at this time.
Please check back later.

Identification Level
Quantitative - Advanced CTY-Level
Verbal - Advanced CTY-Level

Game Theory and Economics

Grades 7–11

Mathematics

IBM founder Thomas J. Watson once said, Business is a game,the greatest game in the world if you know how to play it. In today's global marketplace, understanding game theory,the branch of...
Modality

No sections are open for enrollment at this time.
Please check back later.

Identification Level
Quantitative - CTY-Level

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