Teachers Without Borders - Bangladesh

19/06/2022

👩‍🏫 Lesson for Grade 6: What's the easiest way to explain what a chloroplast is?

- Chloroplasts are parts of a plant cell.
- They convert light energy into relatively stable chemical energy.
- The chemical energy can be stored, like a battery.
- This is where photosynthesis takes place.

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16/06/2022

👩‍🏫 Lesson for Grade 6: What's the easiest way to explain what a nucleus is?

- The nucleus is the "control room" of the cell
- The nucleus controls and regulates all activities of the cell
- The nucleus keeps the DNA safe from the rest of the cell.

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14/06/2022

👩‍🏫 Lesson for Grade 6: What's the easiest way to explain what a chromosome is?

- A chromosome is a part of a cell.
- It contains "all the instructions" to make a new cell
- In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.

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13/06/2022

👩‍🏫 What's the easiest way to explain what a mitochondria is?

- A mitochondria is a part of a cell.
- It is the only part that produces energy, like a power plant.
- Without a mitochondria, a cell would not run. Just like how a city won't run without a power plant.

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07/04/2022

👩‍🏫 Everyone knows what a magnet is.
But what makes a magnet be a 'magnet'?

A. At the atomic level, there are electrons.
- Electrons carry electric charge.
- Electrons spin and circle the nucleus, or core, of an atom.

B. This movement of electrons causes every atom becomes a tiny magnet.

C. In most substances, equal numbers of electrons spin in opposite directions, which cancels out their magnetism.

D. But in magnets and magnetic materials, such as iron, most of the electrons spin in the same direction, making these substances 'magnets'.

P.S.: This is the simplified version for school level. The actual explanation with math is reserved for university level.

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06/04/2022

👩‍🏫 How to explain a battery SIMPLY?

Q. What is Voltage?
A. Water flowing from a greater height to a lower height = electrons flowing from a greater potential to a lower potential = Voltage (Height Difference = Potential Difference = Voltage).

Q. What is Current?
A. Flow of water = Flow of electrons = Current.

Q. What is Charge?
A. Total volume of water flowing in a given time = Total number of electrons flowing in a given time = Charge

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04/04/2022

👩‍🏫 How to 'simply' explain the different types of blood cells?

Q. Why are red blood cells "Couriers"?
A. Because they deliver oxygen and take away carbon dioxide. 🛵

Q. Why are white blood cells "Soldiers"?
A. Because they fight infections. 💂‍♂️

Q. Why are antibodies "Weapons"?
A. Because they are the weapons that white blood cells use. 💣

Q. Why are platelets "Doctors"?
A. Because they heal injuries sites. 👨‍🔬

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27/03/2022

👩‍🏫 How to use 'simply' explain a simple electric circuit?

Step 1: The energy that battery gives out = coal.

Step 2: If energy is coal, then battery = coal mine

Step 3: This makes electron = trucks

Step 4: And bulb = factory

Step 5: Now compare the following two statements:

- Electrons transfer energy from the battery to the bulb.
- Trucks transfers coal from the coal mine to the factory.

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09/03/2022

👩‍🏫 How to use trains to explain how plants transport materials?

*Assuming that plants are like cities

Step 1: City have rail tracks. Plants have Xylem tubes and Phloem tubes.

Step 2: Trains travel on the rail tracks. Water and dissolved minerals travels (one-way) in Xylem tube. Food travels in the Phloem tube.

Step 3: Rail tracks connect different cities together. Xylem and Phloem connects the roots to the rest of the plants.

Step 4: Trains carry passengers. Water, dissolved minerals and food carry energy for the plants.

You can use this example to accurately explain the transportation system in plants.

01/03/2022

👩‍🏫 How to use Hatirjheel to explain a simple electric circuit?

Step 1: Hatirjheel is one way. So is a circuit.

Step 2: Buses travel in Hatirjheel. Electrons travel in a circuit.

Step 3: Buses contain people. Electrons contain energy.

Step 4: Buses unload people at different stops. Electrons unload energy in different components.

Step 5: Buses come back to the starting point. Electrons come back to the battery.

*Assuming that buses only load at one place and unload at all other stops.

You can use this example to explain the difference between serial and parallel circuit.

23/02/2022

ইলেকট্রিক সার্কিট বুঝতে আর বুঝাতে অনেকেরই কষ্ট হয়। তাই আমরা নিয়ে আসছি হাতিরঝিলের উদাহরণ, যা ব্যবহার করে খুব সহজেই বুঝাতে পারবেন কেন দুইটা বাল্ব সিরিয়াললি রাখলে উজ্জ্বলতা কমে, কেন দুইটা বাল্ব সিরিয়াললি রাখলে উজ্জ্বলতা একই থাকে।

উদাহরণের ভিডিও আসবে খুব শীঘ্রই, তাই চোখ রাখুন আমাদের পেজ এ।

05/02/2022

দক্ষিণ মেসোপটেমিয়ায় সুমেরীয়রা প্রথম স্কুল চালু করেছিল। খ্রিস্টপূর্ব ৪র্থ সহস্রাব্দের মাঝামাঝি সময়ে লেখার আবিষ্কার। রাজা ও যাজকদের তখনি বুঝতে পারলো যে তাদেরকে সাধারণ মানুষদেরকে শিক্ষিত করতে হবে।

লেখার উদ্ভাবনের সাথে, সুমেরীয়রা যা দেখেছিল তা রেকর্ড করতে শুরু করেছিল: ব্যবসার রেকর্ড, জায়, দৈনন্দিন জীবনের পর্যবেক্ষণ, ধর্মীয় স্তোত্র, কবিতা, গল্প, প্রাসাদের আদেশ এবং মন্দিরের রেকর্ড।

কিউনিফর্ম চিহ্ন এবং লেখকদের সাধারণ জ্ঞান শিখতে 12 বছর লেগেছিল। মন্দিরগুলি স্কুল প্রতিষ্ঠা করেছিল যেখানে ছেলেদের লেখক এবং পুরোহিত হিসাবে শিক্ষিত করা যায়।

আরো জানতে এখানে ক্লিক করুন: https://www.historyonthenet.com/mesopotamian-education-and-schools?fbclid=IwAR1wTjNxzcWaz-lmKGE-eawLxQ21ji9LcNyzakYXXYZYmlc0y6dKpXJNbCs

Mesopotamian education was a cornerstone of elite life for all empires that dwelt in the Fertile Crescent: the Sumerians, Akkadians, and Babylonians