6/26/2022 | Students will study the Polybius and Caesar cyphers. [Show less] |

7/10/2022 | Students will warm up solving an anagram. Then they will study the pigpen and rail fence ciphers. [Show less] |

7/17/2022 | Students will take one last look at ciphers, solve fun problems of other types, and take a quiz on ciphers. [Show less] |

7/24/2022 | Students will continue their study of logic. [Show less] |

7/31/2022 | Students will continue studying math logic. [Show less] |

8/7/2022 | Students will finish the Intro to Math Logic mini-course and take a quiz. If time permits, they will start a new topic, Lineland. [Show less] |

8/14/2022 | Students will continue studying various shapes intersecting lines and planes. [Show less] |

8/21/2022 | Students may possibly start the next topic, Traveling on a Cube, if time permits. [Show less] |

9/25/2022 | We will cover Chapter 15 -- exploring how objects in a higher number of dimensions look when projected into a smaller number. [Show less] |

10/2/2022 | We will continue with our study of the mathematics of projection. This week we will study Flatland -- a 2D world, in which 3D shapes appear in projected form. [Show less] |

10/9/2022 | We will do a recap of lineland and flatland, including a short quiz. Then we will start the next topic, which is inverse operations. [Show less] |

10/16/2022 | We will discuss the book Flatland. Then we will finish Chapter 18, on inverting operations. If we have time, we start a new Chapter on geodesics (shortest paths) on the cube. [Show less] |

10/23/2022 | In this class we will study geodesics, also known as shortest paths. In most of our experience shortest paths are straight lines. Given any 2 points there is exactly one shortest path between them. But there are spaces in which shortest paths look very different and for which two point may have two very different shortest paths between them (Ch. 19). [Show less] |

10/30/2022 | We will review Chapter 19, on shortest paths on a cube that students were able to pre-study for homework. Then we will cover Chapter 20, which is a review of both topics. There will be a short quiz. Time permitting, we will start to look at Egyptian multiplication. [Show less] |

11/6/2022 | We will finish covering Egyptian multiplication. [Show less] |

11/20/2022 | We will finish studying Chapter 22, revisiting binary numbers. For our class, it is not necessary for students to have studied this topic before in Beginners 1. [Show less] |

12/4/2022 | We follow Chapter 23, learning how to multiply numbers that are represented in binary form. [Show less] |

1/8/2023 | Multiplication is standardly introduced as repeated addition. In this lesson, students will learn that division can be introduced as repeated subtraction. [Show less] |

1/15/2023 | We will do a short discussion of the relationship between ASCII coding and binary numbers. Then we will review some of the techniques from the last two classes (multiplication, division, binary). After a short quiz, we will do some Math Kangaroo problems if time allows. [Show less] |

1/22/2023 | We will demonstrate and then learn a magic trick that use trinary representations to locate a card in a deck. [Show less] |

1/29/2023 | Students will continue practicing the trick and discussing the reason it works. [Show less] |

2/5/2023 | Students will study the associative, commutative, and distributive properties of multiplication using both algebra and geometry. [Show less] |

2/19/2023 | We discussion arithmetic progressions and their sum formula. [Show less] |

2/26/2023 | [Show less] |

3/5/2023 | We will start new materials on time. First we will talk about time zones and their relationships to the division of the Earth into meridians. Then, time permitting, we will start to talk about how to do calculations that involve time. [Show less] |

3/12/2023 | Students will start learning basics of mod n arithmetic, that of a circle divided into n equal parts. [Show less] |

4/2/2023 | We will continue to study the relationship between clocks and arithmetic. Time permitting, we may start our next topic, on the geometry of clocks. [Show less] |