負の数でもゼロよりはまし：掛け算

21 人が学習を完了しました

年齢 7 歳-12 歳

ライブワンタイムクラス

論理、構造、パズルを使って負の数の掛け算と割り算を学びましょう #学術

Thatcher Collins

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4.7

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(337 レビュー)

オンラインライブ授業

一度のみの受講

3 人-8 人 1クラスあたりの学習者

120 分

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このクラスで学べること

英語レベル - 不明

米国の学年 2 - 5

It was not too long ago--relatively speaking--that the concept of zero was very controversial. Part of the reason our word for zero comes from Arabic is because the Islamic mathematicians used it for Algebra, another Arabic-origin word. Well out of this single number for nothing was born an entire set of numbers, all of them less than nothing! This is the first set of truly abstract concepts in mathematics introduced to children. It took math and engineering experts thousands of years to wrap their heads around them, so it's okay to find them difficult too.

In this follow-up 2-hour class we'll now multiply negative numbers (division is almost identical). While adding and subtracting negative numbers has a certain physical manifestation that makes sense, multiplying something that doesn't exist is indeed weird. All multiplication is just a shorthand for repeated addition, so a large part of this class will be learning how to rethink of a multiplication problem as an addition or subtraction problem. Adding in negative variables is a natural thing to add at this time.

Knowledge of adding and subtraction negative numbers is a prerequisite. If your learner takes the companion course covering this topic, I suggest waiting about a month to take this course. Otherwise, it's easy to mix up the two topics. 

We'll also do some more binary logic puzzles, learn a new card game, and talk about how computers use negative numbers.

その他の情報

外部リソース

学習者は、Outschoolが提供する基本ツール以外のアプリやウェブサイトを使用する必要はありません。

先生について

Thatcher Collins

参加しました August, 2020

4.7

337レビュー

プロフィール

教師の専門知識と資格

My goal is to help students make the transition from the arithmetic and memorization stage into the analytical problem solving stage, thereby setting a solid foundation for all further scientific work. Thus, my courses will focus exclusively on: Algebra, Geometry, Logic and the open source Computer Science Unplugged curriculum. Knowing the growing importance of programming in all technical disciplines, I plan to incorporate some advanced ideas that are within reach, e.g. floating point arithmetic and using Algebra to track units of measure.

I was very lucky to have an extraordinary elementary, middle and high school math education. I received a BS in Mathematics from Western Washington University, which included courses in the Moore Method, one of the original "flipped classroom" styles. Currently, I am a part-time MS student in Applied Mathematics at the University of Washington. I recently taught math games, CS Unplugged, Logic, and other activities to the 4th graders at my kids' school, so I've had a chance to practice with this age group.

 I will offer a year-long course covering all of Algebra I and Algebra II (these courses have a lot of overlap so this is not as hard as it sounds). Algebra will be initially offered week-to-week so that students can be sure that my style of teaching works for them.

And In my picture I'm playing a cowbell.