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Strong and Weak Passwords

Third graders learn that a password is like a key to their accounts, discover what makes one strong or easy to guess, and sort password habits into strong and weak.

Grade 3Strong and Weak Passwords50 minutes1 class periodCSTA / ISTEExplicit teaching4 StandardsCSTA
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Lesson at a Glance

Everything you need before the bell rings

Learning Objectives

Students will be able to…

  • ✓Explain why passwords matter.
  • ✓Spot a strong one.
  • ✓Spot a weak one.
  • ✓Sort each habit.
Essential Question

A password is like a key to your online things. What makes that key hard for someone else to copy, and what makes it easy?

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Lesson Phases
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Vocabulary Terms
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Standards Aligned
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Interactive Task
Sort the Habits · Interactive

Sort the Habits

Project this and sort each password habit into strong or weak — tap a habit, then tap where it belongs.

🔒 Sort each password habit: strong or weak?Try it
🔒 Strong
🔓 Weak
Tap a password habit, then tap whether it keeps your account safe (strong) or makes it easy to break into (weak).
The Lesson · Use → Modify → Create (a coding progression with Unplugged practice)

50 minutes, five moves

Tap any phase to open the teacher moves and student actions.

1

Hook — The Key to Your Stuff

5 min

A password is like a key that locks your online things so only you can get in. What would make that key easy, or hard, for someone else to copy?

👩‍🏫 Teacher Moves

  • Show a lock and key.
  • Ask what makes a good key.
  • Set the goal.

🎒 Student Actions

  • Think.
  • Share.
  • Get ready.
2

Use — Sort the Habits

12 min

Students sort password habits as strong or weak.

👩‍🏫 Teacher Moves

  • Send students to Sort the Habits.
  • Drop each habit.
  • Explain each choice.

🎒 Student Actions

  • Sort.
  • Say.
  • Explain.
3

Modify — Fix the Weak One

13 min

Students improve a weak password.

👩‍🏫 Teacher Moves

  • Take a weak password habit.
  • Say how to make it stronger.
  • Explain the fix.

🎒 Student Actions

  • Take.
  • Say.
  • Explain.
4

Create — Password Rules

15 min

Students write password rules.

👩‍🏫 Teacher Moves

  • List three strong-password rules.
  • Draw a lock poster.
  • Add one rule to keep it secret.

🎒 Student Actions

  • List.
  • Draw.
  • Add.
5

Reflect — Keeping Accounts Safe

5 min

Students reflect on passwords.

👩‍🏫 Teacher Moves

  • What makes a password strong?
  • Why should you keep a password secret?
  • Complete the exit ticket.

🎒 Student Actions

  • Say it.
  • Say it.
  • Complete the exit ticket.
Standards Alignment

Built to the standards you report on

Aligned to the CSTA K-12 Computer Science Standards and the ISTE Standards for Students.

CSTA
1A-NI-04

Explain what passwords are and why we use them to protect devices and information.

CSTA
1B-NI-05

Discuss how to protect personal information and keep it private.

CSTA
2-NI-05

Explain how to protect electronic information with strong passwords.

ISTE
2

Manage personal data to maintain digital privacy and security.

Differentiation

One lesson, every learner

Multilingual Learners

ELL / EMERGING READERS
  • Habit cards with lock icons.
  • Sentence frame: “___ is a strong / weak habit.”
  • Sort two habits at a time.

Support & Access

IEP / 504
  • Start with clear strong habits.
  • Sort one habit together.
  • Sort strong habits fully first.

Stretch & Extend

GIFTED / EARLY FINISHERS
  • Rank passwords from weakest to strongest.
  • Discuss why reused passwords are risky.
  • Introduce two-factor authentication.
Materials

What to gather

  • 📽️Projector / board
  • 🖼️Habit cards
  • 💻Sort the Habits
  • 🔒A lock-poster template
  • ✏️Pencils
  • 🎫Exit-ticket slips
Vocabulary

Key terms — hover for a quick definition

passworda secret word or phrase that unlocks an accountaccountyour personal space in an app or websitestrong passworda long, hard-to-guess password with a mix of charactersweak passworda short or obvious password that is easy to guessprivatemeant only for you, not for others to seesecurekept safe from people who should not get inusernamethe name you use to sign in to an accountcybersecuritykeeping computers and information safe
Evaluate

Exit Ticket

Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.

QUESTION 1
What makes a password strong?
It is long and hard to guess, mixing letters, numbers, and symbols, and it is not an obvious word or date.
QUESTION 2
Why should you keep a password secret?
If others learn it, they can get into your account and your private things.
QUESTION 3
Name one habit that makes a password weak.
For example, using 1234, your birthday, or the same password everywhere.

Create: password rules.

Have students list three strong-password rules, draw a lock poster, and add a rule about keeping it secret, so safe habits are clear. A printable passwords worksheet is in the Computer Science library.

Study · Flashcards

Study the key terms

Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.

🃏 Strong and Weak PasswordsFlip
Card 1
Term
Tap to flip →
Meaning
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Nice work!

Practice · Quiz

Check your understanding

A quick self-check with instant feedback, drawn from this lesson’s key terms.

📝 Strong and Weak PasswordsQuiz
Score: 0
1 / 6
Question 1
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Nice work!

Practice · Worksheet

Printable worksheet

A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.

🖨️ Strong and Weak PasswordsPrint
Name: ________________________
Date: ____________

Part A · Write the word that matches each meaning

Word bank: account, cybersecurity, password, private, secure, strong password, username, weak password
  1. a short or obvious password that is easy to guess
  2. meant only for you, not for others to see
  3. the name you use to sign in to an account
  4. keeping computers and information safe
  5. a long, hard-to-guess password with a mix of characters
  6. kept safe from people who should not get in
  7. a secret word or phrase that unlocks an account
  8. your personal space in an app or website

Part B · Show what you learned

  1. What makes a password strong?
  2. Why should you keep a password secret?
  3. Name one habit that makes a password weak.
Answer key — Part A: 1) weak password · 2) private · 3) username · 4) cybersecurity · 5) strong password · 6) secure · 7) password · 8) account
Part B: 1) It is long and hard to guess, mixing letters, numbers, and symbols, and it is not an obvious word or date. 2) If others learn it, they can get into your account and your private things. 3) For example, using 1234, your birthday, or the same password everywhere.