[Weekly Update] Crowdmath 2022, Wordle, and daytime sections

New opportunities for classes, projects, and more this week ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ New course sections now available! [SHOP NOW]( Your Weekly Update Upcoming Daytime Sections We're running certain AoPS courses at 4:30 pm ET (1:30 pm PT) for families who need an earlier start time. Sections fill quickly – enroll now to save your student's spot. - [Introduction to Algebra B]( - starts today, January 19th - [Introduction to Geometry]( - January 28th - [Prealgebra 1]( - February 1st - [Prealgebra 2]( - February 11th - [Introduction to Counting & Probability]( - February 15th - [Introduction to Algebra A]( - February 15th [Schedule Your Class Today]( Crowdmath 2022 is Now Open Crowdmath is back for a seventh year! High school and college students with advanced math backgrounds are eligible to join this year-long research project and collaborate with top-tier research mentors and an exceptional peer group. [Read more about the guidelines and sign up here.]( This Year's Topic: Factorization in Additive Structures Haven't heard of this topic before? Let's start with Chicken McNuggets. Originally, Chicken McNuggets were sold in packs of 6, 9, and 20 pieces. An AoPS student might ask: "what numbers of Chicken McNuggets can you buy?" and "what is the largest number you can’t buy?" While these questions sound a little silly, they are examples from a very deep area of mathematics. The set of numbers of McNuggets you can buy is an example of a numerical monoid, and the largest number you can’t buy is called the Frobenius Number. For this year's CrowdMath project, we'll work together to tackle research problems that generalize the idea of numerical monoids, and along the way we'll encounter topics like ideal theory and semigroup theory. See you there! The Math of Winning Wordle Like the rest of the planet, we've also gotten obsessed with Wordle. From letter distribution to first-word strategies, we analyze Wordle word lists for patterns and come up with tips for playing — and winning — mathematically. [Read it here!]( Math Jams Discuss new ideas, courses, and more with our free online math discussions. [Find the full Math Jam schedule here.]( 2022 AMC 8 Discussion January 26 - Wednesday at 7:30 pm ET / 4:30 pm PT AoPS instructors will discuss problems from the 2022 AMC 8 contest, administered January 18–24, 2022. MIT PRIMES/AoPS CrowdMath 2022 January 27 - Thursday at 7:30 pm ET / 4:30 pm PT CrowdMath mentors will talk about what the MIT PRIMES/AoPS CrowdMath project is all about, and discuss math related to the 2022 topic: Factorization in Additive Structures Keep Learning Matching Cards Two shuffled standard 52-card decks are placed side by side. What is the reciprocal of the probability that at least one card is in the same position in both decks, to nine decimal places? AoPS Online Course List Introductory Math [Prealgebra 1]( January 23 - Sundays at 7:30–8:45 PM ET (4:30–5:45 PM PT) **February 1 - Tuesdays at 4:30–5:45 PM ET (1:30–2:45 PM PT)** [Prealgebra 2]( January 31 - Mondays at 7:30–8:45 PM ET (4:30–5:45 PM PT) **February 11 - Fridays at 4:30–5:45 PM ET (1:30–2:45 PM PT)** [Introduction to Algebra A]( January 21 - Fridays at 7:30–9:00 PM ET (4:30–6:00 PM PT) February 10 - Thursdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) **February 15 - Tuesdays at 4:30–6:00 PM ET (1:30–3:00 PM PT)** [Introduction to Counting & Probability]( **February 15 - Tuesdays at 4:30–6:00 PM ET (1:30–3:00 PM PT)** February 16 - Wednesdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) [Introduction to Number Theory]( February 10 - Thursdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) [Introduction to Algebra B]( **January 19 - Wednesdays at 4:30–6:00 PM ET (1:30–3:00 PM PT)** February 6 - Sundays at 7:30–9:00 PM ET (4:30–6:00 PM PT) [Introduction to Geometry]( January 26 - Wednesdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) **January 28 - Fridays at 4:30–6:00 PM ET (1:30–3:00 PM PT)** February 8 - Tuesdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) Intermediate Math [Intermediate Algebra]( February 6 - Sundays at 7:30–9:00 PM ET (4:30–6:00 PM PT) [Intermediate Number Theory]( February 15 - Tuesdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) Contest Preparation [MATHCOUNTS/AMC 8 Basics]( January 30 - Mondays at 7:30–9:00 PM ET (4:30–6:00 PM PT) [MATHCOUNTS/AMC 8 Advanced]( February 3 - Thursdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) [Special AIME Problem Seminar A]( **January 29 & 30 - Saturday & Sunday at 3:30–6:30 PM ET (12:30–3:30 PM PT)** [Special AIME Problem Seminar B]( **February 5 & 6 - Saturday & Sunday at 3:30–6:30 PM ET (12:30–3:30 PM PT)** Computer Science [Introduction to Programming with Python]( January 27 - Thursdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) [Intermediate Programming with Python]( January 26 - Wednesdays at 7:30–9:00 PM ET (4:30–6:00 PM PT) For more puzzles visit our [Keep Learning]( webpage. 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