Teaching crypto wallets in class without real money or real keys
A 45-minute sequence for a high school class or a workshop: students open a practice wallet on their own device, redo the arithmetic behind the screen, and learn why a picture of a balance proves nothing.
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Teach it as a 45-minute reading exercise on a practice wallet: each student opens the free demo at mylarpwallet.com/demo on their own device, with no account and no purchase, and every screen carries a DEMO mark. The class checks that each row is quantity times price, recomputes the 24-hour change from yesterday's value, and learns that a screenshot proves no funds and that a seed phrase is never typed into a website, form or chat.
The cryptocurrency lesson plan at a glance
Nothing is bought or installed, and no number on screen is anyone's money.
| Minutes | Block | Students |
|---|---|---|
| 0-5 | Setup | Open the demo, find the DEMO mark |
| 5-15 | Balance | Change quantities, watch the total |
| 15-30 | 24-hour change | Paper, then screen |
| 30-40 | Proof and safety | Screenshots, seed phrases |
| 40-45 | Exit ticket | Three questions |
Minutes 0 to 5: one link, no accounts
Write one address on the board: the free practice crypto wallet at /demo, our browser-based wallet simulator. No sign-up, so no student email or password. Have everyone find the DEMO badge in the status bar and the site address tiled across the screen: every picture taken from the page carries the tiled address, even a tight crop.
Know the limits. Each browser gets 12 changes, and "Start over from the default wallet" gives twelve more. The composition stays 7 days in that browser and nowhere else, so 30 students means 30 separate wallets; on a shared lab computer, start over between groups. Prices are live, refreshed every 4 seconds, so two screens taken seconds apart rarely match to the cent.
Minutes 5 to 15: a balance is quantity × price
Students tap the BTC chip and set "How much of it" to 1: the row now shows the unit price. At 0.5 the row halves. Type 1000 in the cash row and the total rises by exactly $1,000. Three changes, one rule: each row is quantity × price, and the top figure is the rows plus cash.
The total moves while nobody touches anything: a balance is recalculated, not stored, which is why a total typed by hand instead of summed gives an edited screen away. The anatomy of a wallet portfolio screen names each part.
Minutes 15 to 30: the 24-hour change
On the board, with example prices:
- 0.1 BTC, $80,000 yesterday, $84,000 today: $8,000 → $8,400 (+5%).
- 2 ETH, $2,500 yesterday, $2,400 today: $5,000 → $4,800 (-4%).
- Cash: $1,000, no change.
Yesterday $14,000, today $14,200: +$200, and 200 divided by 14,000 is +1.43%. The usual wrong answers: averaging the row percentages gives +0.50%, dividing by today's total gives +1.41%. The base is always yesterday. Cash dilutes the move: without it, +1.54%.
A wallet screen shows today's value and percentage, so students work backward: $8,400 divided by 1.05 is $8,000. Then on their own screen: screenshot it so prices stop moving, add the rows' dollar changes, compare with the change under the total, divide by the total minus that change. It matches within a cent or two.
Minutes 30 to 40: proof and the seed rule
Ask: you typed this balance, the prices are real, the arithmetic checks. What does a picture of it prove? Nothing about anyone's money. A block explorer shows what a public address holds, and only a message signed from that address ties it to a person. Pairs then try the tells from how to spot a fake crypto wallet screenshot on each other's screen.
A seed phrase is 12 or 24 words that rebuild a wallet on any device: whoever has them has the funds, with no password reset. Never type it into a website, a form, a "support" chat, a game or a giveaway. The practice wallet never asks for one; a page that does is a theft attempt.
Minutes 40 to 45: exit ticket
- A wallet holds 0.4 BTC and $2,000 cash. BTC was $80,000 yesterday, $76,000 today. Balance, change in dollars, change in percent? ($32,400, -$1,600, -4.71%.)
- One thing that proves a balance, one that never does? (An address on a block explorer plus a message signed from it; a screenshot.)
- A page asks for your 12 words to "verify" your wallet. What do you do? (Close it, tell someone.)
Wrong answers to question 1 are diagnostic: -4.94% means dividing by today's total, -5% means the cash was ignored.
Questions
Do students need an account or any crypto to follow this lesson?
No. The demo opens in any phone or laptop browser without an account, reads no blockchain and never asks for a key or a recovery phrase. Every quantity and cash amount on it is typed in; only the token prices are real market prices.
Can 30 students use the demo at the same time?
Yes, and each student gets a separate wallet: the composition is kept in that student's browser, not on a shared server, so nobody sees a classmate's screen. Each browser allows 12 changes and keeps the composition for 7 days; starting over from the default wallet clears it and gives twelve more.
How do I explain a seed phrase without showing a real one?
Call a seed phrase the master key: 12 or 24 words that rebuild the wallet on any device, so whoever holds them holds the funds, with no password reset. The only screen that ever needs them is the owner's own wallet app when restoring it. A website, form, support chat or giveaway that asks for them is a theft attempt.
Compose the screen instead of describing it
Your tokens, your amounts, your accent — laid out in the browser, then opened on your phone at your own address. A mockup, and we never pretend otherwise.
- Unlimited tokens, amounts and accents
- Add it to your home screen; it opens like an app
- Live market prices that keep moving
- Your own address, mylarpwallet.com/you
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