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

You now know what AND, OR, and NOT mean. You know how to connect switches and make choices.

Now you’ll learn the biggest truth of all:
👉 This is the brain of the computer.

All those decisions, actions, and results you see on your screen? They start here.

 

💡 What Is a Logic Circuit?

When we combine gates to solve a problem—like checking a password or adding numbers—we call it a logic circuit.

A circuit is just a bunch of gates connected in a smart way.

And these circuits are made from transistors—tiny switches that act like gates.

 

🧠 What Is the CPU?

The CPU (central processing unit) is the part of your computer that:

  • Follows logic

  • Makes decisions

  • Runs programs

It’s made of millions of gates working together—flipping switches every second.

Every click, tap, or key you press? The CPU handles it with logic gates.

 

🧮 What Can These Gates Do?

With enough gates, you can:

  • Add numbers

  • Store memory

  • Compare things

  • Run code

  • Solve problems

It’s not magic. It’s just switches following rules.

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