Keep it really safe!

1. Prepare

• Read through the student material in the LEGO^® Education SPIKE^™ App.

2. Engage (5 Min.)

• Use the ideas in the Ignite a Discussion section below to engage your students in a discussion related to this lesson.
• Use the video to explain the lesson.

3. Explore (20 Min.)

• Have your students work in pairs to build the super-safe-deposit box.
• Ask them to play the program to see how the lock works.

4. Explain (5 Min.)

• Facilitate a discussion about how and when to use "AND" and "OR" in compound conditionals

5. Elaborate (15 Min.)

• Ask your students to make their super-safe-deposit boxes even more secure by adding compound conditionals to their programs.
• Don't forget to leave some time for clean-up.

6. Evaluate

• Give feedback on each student's performance.
• In order to simplify the process, you can use the assessment rubrics that have been provided.

Start a discussion about iteration or fixing things by asking relevant questions. Here are some suggestions:

• What can happen if somebody hacks your password?
• How can you evaluate the strength of a password?
• What's a compound condition?

Have your students watch this video to see what they're about to do.

Partner Build
Split each team's building tasks in order to ensure that everyone is actively involved:

• Student A: Super-Safe box
• Student B: Super-Safe door and arm

Align Motors Correctly
Make sure that the arm is raised when you start the program.

Manual Unlock
This model has a manual key that can be used to unlock the door if needed.

Main Program

Possible Solution

Other Programs

Simplify this lesson by:

• Programming just one compound condition

Take this lesson to the next level by:

• Having your students add more sensors (e.g. Distance Sensor, Force Sensor) to their models to create other compound conditions
• Having each team challenge another team to unlock their super-safe-deposit box
• Asking your students to use the NOT function when defining their conditions

Teacher Observation Checklist
Create a scale that suits your needs, for example:

1. Partially accomplished
2. Fully accomplished
3. Overachieved

Use the following success criteria to evaluate your students' progress:

• Students understand what a compound condition is.
• Students are able to use compound conditions in their program.
• Students can discuss digital security in detail and with precision.

Self-Assessment
Have each student choose the brick that they feel best represents their performance.

• Blue: I've used one compound condition in my program.
• Yellow: I've used two compound conditions in my program.
• Violet: I've used more than two compound conditions to create a super safe program!

Peer Feedback
Encourage your students to provide feedback to one another by:

• Having one student score the performance of another using the coloured brick scale above
• Asking them to present constructive feedback to each other so that they can improve their group's performance during the next lesson.

To incorporate the development of literacy skills:

• Have your students explore the meaning of digital security terminology, like:

  ▷ Boolean
  ▷ Conditions
  ▷ Compound Conditions
  ▷ AND, OR, NOR, NOT
  ▷ Encryption
  ▷ Case-sensitive

Note: This will make for a longer lesson.

The students who enjoyed this lesson might be interested in exploring these career pathways:

• Information Technology (Computer Programming)
• Information Technology (IT Applications)
• Information Technology (Oracle / Database Programming)
• Information Technology (Web Design)