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

AND is powerful—but it’s not the only way to think. Computers use many rules to make smarter decisions.

Let’s now explore:

  • OR: Good when even one input is enough

  • NOT: Flips a decision

 

⚡ OR Gate – The Easygoing Rule

“Turn ON if at least one input is ON.”

Imagine:

  • You press button A → light turns ON

  • You press button B → light turns ON

  • You press both → light still ON

  • Only when both are OFF → light is OFF

This is useful for alerts:

  • “Is the door open OR the window broken?”

If either one is true, the alarm goes off.

 

🔄 NOT Gate – The Opposite Rule

“If it’s ON, make it OFF. If it’s OFF, make it ON.”

One switch goes in, the opposite comes out.

This helps flip decisions:

  • “If button is NOT pressed, show message.”

  • “If light is NOT detected, turn it ON.”

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