Course Content
Part 1: What Does the CPU Really Do?
What Is a CPU and Why Is It So Important? The Difference Between RAM, Storage, and the CPU What Happens When You Click a Button on Your Computer?
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Lesson 1: What Is a CPU and Why Is It So Important?
Lesson 2: How the CPU, RAM, and Storage Work Together
Lesson 3: What Happens When You Click Something on Your Computer?
Lesson 4: A Closer Look Inside the CPU
Part 2: Now Let’s Dive Into the CPU.
Let’s open the brain of the computer and peek inside!
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Lesson 1: What Are Registers and Why Are They So Fast?
Lesson 2: The ALU — The Tiny Calculator Inside Your Computer
Lesson 3: The Control Unit – The CPU’s Bossy Time-Keeper
Lesson 4: What Is a Clock Cycle and Why Does Speed Matter?
Part 3: How Instructions Are Followed
Show how the CPU fetches, decodes, and runs instructions using a simple loop.
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Lesson 1: What Is an Instruction?
Lesson 2: How Does the CPU Read Instructions One by One?
Lesson 3: The Fetch–Decode–Execute Cycle (Made Super Simple)
Lesson 4: What Happens in Just One Second Inside the CPU?
Part 4: How the CPU Does Math and Logic
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How Flipping a Switch Sends a Message
Why Computers Are Made of Millions of Switches
How Can a Switch Help Make a Choice?
Let’s Build an AND Gate with Switches
OR and NOT — Other Smart Rules Computers Use
Combining Logic to Make Smarter Machines
How Logic Gates Become a Computer’s Brain
🧩 How Computers Use Yes and No to Count Numbers
➕ How to Add Using Wires and Logic Rules
How the CPU Adds and Subtracts with Only Switches
AND, OR, NOT — The CPU’s Way of Making Choices
How the CPU Compares Things and Decides What to Do
Math Tricks Computers Use to Work Faster
Part 5: How the CPU Talks to Memory and Storage
This part will explain how the CPU and memory are like two people trying to talk across a busy room — and why the CPU needs clever helpers like RAM and cache instead of going straight to the hard drive.
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Lesson 1: Why the CPU Doesn’t Talk to the Hard Drive Directly
Lesson 2: What’s a Cache and Why Is It So Fast?
Lesson 3: How the CPU Sends and Gets Data from RAM
Lesson 4: What Happens When There’s Too Much to Remember?
Part 6: Paths and Highways: How CPUs Talk to Everything
So far, we’ve learned how the CPU works with RAM, cache, and storage. But the CPU doesn’t live alone — it has to talk to memory, graphics cards, USB sticks, and more.
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Lesson 1: What Is a Bus? (Not the Kind You Ride)
Lesson 2: How Data Travels Inside a Computer
Lesson 4: How the CPU Works with the Graphics Card and the Motherboard
Lesson 5: What Happens If Two Parts Try to Talk at Once?
How CPUs Are Getting Faster and Smarter
Now: Let’s zoom into what makes modern CPUs so much faster.
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Lesson 1: What Is a Core, and Why Do Some CPUs Have Many?
Lesson 2: How Pipelining Helps the CPU Do More Things at Once
Lesson 3: Why CPUs Get Hot and How CPU Designs Differ
How Computers Think: Inside the CPU

🔍 Why This Matters

One switch is great. But if one switch can only mean “yes” or “no,” how do we get full videos, websites, or games?

The answer: Lots of switches. Millions of them.

 

🧠 Each Switch Adds More Possibilities

If 1 switch = 2 messages
Then:

  • 2 switches = 4 patterns

  • 3 switches = 8 patterns

  • 8 switches = 256 patterns

That’s how we get letters, colors, music—all from combinations of ON and OFF.

 

💾 Memory, Logic, and Speed

All of a computer’s work is done by these switches:

  • Memory chips store data as ON/OFF patterns

  • Logic chips make decisions using switch rules

  • CPUs flip switches billions of times per second

These switches are tiny—they’re called transistors. A single chip can have more than a billion transistors.

 

🔍 Why It Works So Well

Because electricity is fast. And switches are reliable. Together, they let computers:

  • Remember things

  • Compare things

  • Do math

  • Show results

All using nothing but electricity and smart circuits.

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