Free, hands-on technology lessons
Understand the tech you use.
Try it for yourself.
Learn how websites, security, and everyday IT work through small experiments. Make a prediction, change a setting, and see why the result changes.
Made for beginners. No account, coding setup, or payment.
A tiny experiment · try it here
You type a name. What happens next?
A website name is easy for us to remember. Your browser still needs to find where to send its request.
A learning loop, not a reading list
Leave with an idea you can explain.
Each guided lesson combines an explanation, a working teaching model, and a question that checks whether the idea clicked.
What do you think happens?
Start with an everyday question, without needing to know the terminology.
Change one thing.
Use a safe, simplified model to see the cause and effect. Nothing changes on a real system.
Check your reasoning.
Get an explanation for each answer, then connect the idea to the next lesson.
Start with something familiar
What would you like to understand?
How websites work
Follow a website name to an address, understand saved copies, and find out who runs the servers.
Start this path 3 short lessons · about 15–20 minEveryday account security
Find out what a padlock proves, why a second factor helps, and which permissions a task needs.
Start this path 3 short lessons · about 15–20 minFiles, Wi-Fi & everyday IT
Recover a pretend deleted file, find a download bottleneck, and test a small office change.
Start this pathTime estimates are suggestions. Go at your own pace; your path progress stays in this browser.
Have a problem right now?
Work out what to check next.
Walk through a website that will not load, a stale page, a slow download, or a missing file. Get a checklist based on your observations.
Explore a problem →Teaching a group?
Turn curiosity into a short workshop.
Use facilitator plans, printable worksheets, and discussion prompts with a class, study group, or community workshop.
Open the teaching toolkit →Go deeper when you are ready
39 explanations & technical references.
Original technical writing alongside visual foundations. Older walkthroughs retain their publication dates and software context.