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Introduction to Number TheoryFundamental principles of number theory, including primes and composites, divisors and multiples, divisibility, remainders, modular arithmetic, and number bases.This course is University of California ag approved. Click here for more details. 
12 weeks 
12 weeks ARE YOU READY? DO YOU NEED THIS? 
Schedule
Wednesday
Feb 1  Apr 19 
7:30  9:00
PM ET
Feb 1  Apr 19
7:30  9:00 PM Eastern 6:30  8:00 PM Central 5:30  7:00 PM Mountain 4:30  6:00 PM Pacific Click here to see more time zones 
Alyssa Zisk 
$295
$342 w/books

$295
With Books $342

Monday
Feb 20  May 8 
7:30  9:00
PM ET
Feb 20  May 8
7:30  9:00 PM Eastern 6:30  8:00 PM Central 5:30  7:00 PM Mountain 4:30  6:00 PM Pacific Click here to see more time zones 
Joseph Stahl 
$295
$342 w/books

$295
With Books $342

Friday
Mar 17  Jun 2 
7:30  9:00
PM ET
Mar 17  Jun 2
7:30  9:00 PM Eastern 6:30  8:00 PM Central 5:30  7:00 PM Mountain 4:30  6:00 PM Pacific Click here to see more time zones 
Maria Monks Gillespie 
$295
$342 w/books

$295
FULL
With Books $342

Wednesday
May 31  Aug 16 
7:30  9:00
PM ET
May 31  Aug 16
7:30  9:00 PM Eastern 6:30  8:00 PM Central 5:30  7:00 PM Mountain 4:30  6:00 PM Pacific Click here to see more time zones 
Ameera Chowdhury 
$295
$342 w/books

$295
ENROLL
With Books $342
5 spots left 
Tuesday
Jun 13  Sep 5 
7:30  9:00
PM ET
Jun 13  Sep 5
7:30  9:00 PM Eastern 6:30  8:00 PM Central 5:30  7:00 PM Mountain 4:30  6:00 PM Pacific Click here to see more time zones 
Daniel Kneezel 
$295
$342 w/books

$295
ENROLL
With Books $342

Thursday
Jun 29  Sep 14 
7:30  9:00
PM ET
Jun 29  Sep 14
7:30  9:00 PM Eastern 6:30  8:00 PM Central 5:30  7:00 PM Mountain 4:30  6:00 PM Pacific Click here to see more time zones 
Luis Ares 
$295
$342 w/books

$295
ENROLL
With Books $342

Friday
Sep 22  Dec 15 
7:30  9:00
PM ET
Sep 22  Dec 15
7:30  9:00 PM Eastern 6:30  8:00 PM Central 5:30  7:00 PM Mountain 4:30  6:00 PM Pacific Click here to see more time zones 
TBA 
$295
$342 w/books

$295
ENROLL
With Books $342

Tuesday
Oct 24  Jan 30 
7:30  9:00
PM ET
Oct 24  Jan 30
7:30  9:00 PM Eastern 6:30  8:00 PM Central 5:30  7:00 PM Mountain 4:30  6:00 PM Pacific Click here to see more time zones 
TBA 
$295
$342 w/books

$295
ENROLL
With Books $342

AoPS Holidays
There are no classes May 29, July 4, September 4, November 18  26, and December 21  January 3.
Who Should Take?
This course is appropriate for students in grades 69 who have mastered basic algebra up through solving linear equations and manipulating multivariable expressions. Students who have completed our Introduction to Algebra A course should have sufficient background. Students who are already proficient with modular arithmetic and basic Diophantine equations do not need this course. This course is roughly the same difficulty as our Introduction to Counting and Probability class. For those preparing for contests, this course should help with MATHCOUNTS and the AMC 8/10/12 tests.Lessons
Lesson 1  Integers, Fractions, Decimals, and Number Bases 
Lesson 2  Base Number Arithmetic 
Lesson 3  Multiples, Divisors, and Prime Numbers 
Lesson 4  Common Factors, Common Multiples, Euclidean Algorithm 
Lesson 5  Divisor Problems, More with the Euclidean Algorithm 
Lesson 6  Factorials, Special Integers, Algebra with Integers 
Lesson 7  Units Digit, Introduction to Modular Arithmetic 
Lesson 8  Calculations with Modular Arithmetic 
Lesson 9  Divisibility Rules and Multiplicative Inverses 
Lesson 10  Multiplicative Inverses, Solving Linear Congruences 
Lesson 11  Systems of Linear Congruences and the Chinese Remainder Theorem 
Lesson 12  Number Sense and Applications of Number Theory 
Required Textbook
Introduction to Number Theory
A thorough introduction for students in grades 710 to topics in number theory such as primes & composites, multiples & divisors, prime factorization and its uses, base numbers, modular arithmetic, divisibility rules, linear congruences, how to develop number sense, and more.
