Teaching with AI, Learning Sustainably

TL;DR Summary

• AI queries can use several times more energy than a web search - small daily choices matter.
• In practice: prefer lighter tools, avoid “always-on” AI, and combine AI with having students assess each other's work.
• First step: build sustainability into your everyday classroom use of AI.

AI in Class, but at What Cost?

AI is becoming part of daily teaching life. From generating quiz questions to giving feedback on essays, tools like ChatGPT or Copilot can save time and inspire creativity. But every generated text or answer depends on servers that consume electricity, water and raw materials.

Did you know? Running AI feedback across a whole class set of essays can use several times more energy than checking them with built-in grammar tools or peer review by pupils.

As a teacher, you cannot control global data centres. What you can do is make conscious choices about how you use AI in your lessons - to reduce waste, set an example for pupils, and integrate sustainability into digital literacy.

Everyday Choices That Make a Difference

1. Be Selective With AI Use

Not every task needs AI.

• Worthwhile: brainstorming examples, drafting quizzes, rephrasing instructions.
• Skip AI when: the task can be handled more quickly or efficiently with a calculator, grammar checker or peer review.

💡 Rule of thumb: use AI for high-value, low-frequency tasks - not for every small detail.

2. Choose Lighter Tools Where Possible

Large models (such as latest versions of ChatGPT) consume far more resources than smaller ones. Research suggests compressed or “distilled” models can use significantly less energy - sometimes up to 80% less in specific scenarios - while still being accurate enough for many classroom tasks.

• Writing support: a simple spell checker or lightweight AI may be sufficient.
• Maths support: a calculator app is far greener than a heavy AI maths solver running in the cloud.

3. Avoid “Always-On” AI

Continuous assistants that monitor every keystroke keep servers running constantly.

• Instead, activate AI only when it adds real value (e.g. run a grammar checker once per draft rather than keeping it live throughout).
• Studies suggest this simple shift can reduce unnecessary energy use without affecting outcomes.

4. Combine AI With Peer Feedback

AI can give instant suggestions, but peer review develops critical skills - and requires no server energy.

• Example: pupils draft essays, exchange structured peer comments, then use AI for one final round of refinement.
• Outcome: greener and stronger pedagogy.

5. Discuss the Hidden Footprint With Pupils

Use sustainability as a teaching moment:

• Share that an AI query may consume several times more energy than a web search.
• Ask: when is AI worth the cost?
• Link this to broader lessons on climate and technology, building pupils' critical digital literacy.

Common Myths for Teachers

• “AI is always faster.” A calculator or built-in spell check is often quicker and greener.
• “Lightweight AI isn't accurate enough.” For many classroom tasks, smaller models perform perfectly well.
• “Pupil use is outside my control.” Teachers can still guide pupils towards efficient apps and mindful habits.

First Steps You Can Take This Week

• Pick one lesson where you replace AI with a simpler method (e.g. swap AI feedback for peer feedback).
• Compare a lighter tool with a large AI model - is the outcome “good enough”?
• Start a classroom conversation about digital footprints and hidden costs.

Balance in Daily Teaching

AI is not the enemy - it can enrich lessons and save time. But like printing worksheets or leaving lights on, careless use adds to the school's footprint. By making small, practical adjustments, teachers can model responsible technology use and show pupils that innovation and sustainability go hand in hand.

Read the Full Article Series

This article is part of our sustainability in AI series:

1. The Ecological Footprint of AI - What Does It Mean for Schools?
2. Teaching with AI, Learning Sustainably - Practical Tips for Teachers (you are here)
3. Sustainable AI in Schools - From Awareness to Policy (you are here)