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November 2025

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2025年11月9日 / Last updated : 2025年11月9日 桑子 研 Science

Is This Roadside Weed a Dicot or a Monocot? The Moment the Textbook “Rules” Fall Apart

I’m Ken Kuwako, Science Trainer. Every day is an experiment. “The Observation Lesson on Ribwort Plantain” – Dicot or Monocot? Exploring a Plant That Breaks the Rules of Classification! In middle school science, we learn the terms “dicotyledons (dicots)” and “monocotyledons (monocots).” Textbooks often present a neat way to classify them: “If it has two […]

2025年11月8日 / Last updated : 2025年11月8日 桑子 研 Science

The Science Teacher’s Secret Weapon: Cutting 5 Hours of Grading Down to 2 with Digital Systems

I’m Ken Kuwako, a Science Trainer. Every day is an experiment. [This article is also available on the radio!] While preparing for experiments and innovating in class are essential, grading tests to accurately measure each student’s comprehension is an equally critical task. Grading a large volume of answer sheets within a limited timeframe and then […]

2025年11月8日 / Last updated : 2025年11月8日 桑子 研 Science

The 10x Secret: How the Pascal Cable Turns a Safe 5 Amps into Mind-Blowing Electromagnetism!

Hello! I’m Kuwako Ken, your Science Trainer. Every day is an experiment! “Electricity” and “Magnetism.” Do you remember the familiar “Right-Hand Screw Rule” or “Fleming’s Left-Hand Rule” from your science classes? They are textbook staples, but the reality is that when you actually try the experiments, the compass needle only moves a “little bit,” or […]

2025年11月8日 / Last updated : 2025年11月8日 桑子 研 Science

Pascal’s Power Coil: Turn One Wire into a 200-Turn Electromagnet! (And Make It Safe!)

Hello! I’m Kuwako Ken, your Science Trainer. Every day is an experiment! It looks like just a single electrical cable. But what if that one wire secretly held the power of ten wires? Doesn’t that sound exciting? The “Pascal Cable” I introduced recently is exactly that kind of magical item. A single tube bundles 10 […]

2025年11月8日 / Last updated : 2025年11月8日 桑子 研 Science

Why Is the Sky Blue and the Sunset Red? Discover the Secret with Soap Bubbles and a Plastic Bottle!

I’m Ken Kuwako, a Science Trainer. Every Day is an Experiment! “Why is the sky blue?” “If it’s blue, then why are sunsets red?” If you’re a science teacher (or maybe a parent), you’ve probably been asked these questions by a child at some point. While explaining “light scattering” using words and diagrams is certainly […]

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運営者:桑子研(くわこ けん)
科学の楽しさや不思議、感動を多くの人に届けていきたい。理科教師として勤務する傍ら、サイエンストレーナーとしてテレビ番組の科学監修・出演、実験教室、科学本執筆なども行っています。

Author: Ken Kuwako
I want to share the fun, wonder, and excitement of science with as many people as possible. In addition to my work as a science teacher, I also work as a "Science Trainer," providing scientific supervision for and appearing on TV programs, holding hands-on science workshops, and writing science books.

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2025年12月13日

The Invisible Truth: How to See the Path of Light with Chalk Dust and a Spray Bottle

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