AI Uses Energy Too:
Systems, Choices, and Trade-offs
Two Grade 3 lessons that help students see AI as part of a real-world system and decide whether an AI use is meaningful, proportional, and worth it.
Big idea for Grade 3
Digital tools are connected to real-world systems. We use AI wisely by thinking about purpose, value, alternatives, amount, and care.
Classroom message
Use AI when it helps you think better, not when it replaces your thinking.
Helping students evaluate AI use through systems and trade-offs
This Grade 3 mini-unit builds on earlier ideas that AI is a helper, uses energy, and is connected to systems beyond the screen.
Students now begin to ask whether a particular use of AI is meaningful enough to justify using the tool. The goal is not guilt or prohibition, but thoughtful judgment.
Lesson 1: The AI System Behind the Screen
Students understand that AI is part of a larger system that includes people, devices, networks, computers, electricity, and human thinking.
Learning goal
Students understand that AI is part of a larger real-world system.
Key message
AI is not just on the screen. It is part of a real-world system.
Duration
40–45 minutes.
Materials
Chart paper, markers, paper, crayons or colored pencils, sticky notes, and optional picture cards.
Simple systems model
AI is part of a system
AI feels like it lives on the screen, but it is connected to many real things: devices, internet networks, large computers, electricity, people who design the tools, and people who decide how to use the answers.
Lesson flow
- 1Opening question: Ask students what they see when they use AI and what might be happening that they do not see.
- 2Build the system together: Draw a class systems map showing the parts connected to an AI answer.
- 3Group activity: Sort items into “part of the AI system” or “not part of the AI system.”
- 4Draw your own map: Students create “My AI System Map.”
- 5Quick reflection: Students explain why it matters that AI is part of a system.
Student sentence stem
AI is part of a system because __________.
Simple assessment
- ✓Students can identify several parts of the AI system.
- ✓Students can explain that AI depends on computers and electricity.
- ✓Students can draw a simple systems map.
Lesson 2: Is This AI Use Worth It?
Students evaluate AI use by comparing purpose, value, alternatives, amount, energy, and continued human thinking.
Learning goal
Students learn to evaluate whether an AI use is purposeful, useful, and proportional.
Key message
A wise AI choice has a clear purpose and helps us think, learn, solve, or care.
Duration
40–45 minutes.
Materials
Board or chart paper, scenario cards, student worksheet or paper, pencils, and optional category signs.
The “Worth It?” questions
Before using AI, ask:
We do not need to calculate the exact energy of every AI question. But we can learn to make wise choices by asking better questions.
Lesson flow
- 1Opening review: Ask what students remember about AI as a system.
- 2Introduce the questions: Teach students the “Is this AI use worth it?” checklist.
- 3Scenario sort: Students classify examples as Worth It, Maybe, or Not Worth It.
- 4Improve the choice: Students rewrite a weak AI use as a wiser AI use.
- 5Individual reflection: Students complete sentence stems about wise AI use.
Student sentence stems
A good reason to use AI is __________.
AI is not needed when __________.
I can use AI wisely by __________.
I still need to think because __________.
Simple assessment
- ✓Students can use the “Worth It?” questions to evaluate an AI use.
- ✓Students can identify whether an AI use is valuable, uncertain, or wasteful.
- ✓Students can suggest a better version of a weak AI use.
Is This AI Use Worth It?
Use AI when it helps you think better, not when it replaces your thinking.
For Grade 3, the key idea is early trade-off thinking.
Students already understand that AI is a helper and that it uses energy somewhere. Now they can begin to evaluate whether a use of AI is worthwhile.
The goal is not to make students feel guilty about using technology. The goal is to help them develop judgment: Is this use purposeful? Is it useful? Is it proportional? Did I still think?