🍌 Banana DNA Extraction STEM Challenge

Make the Invisible Visible

🧬 What Is It?

The Banana DNA Extraction Challenge takes the abstract world of cells and genetics and puts it right in front of learners — where they can see, touch, and describe DNA.

They’ll:

Break down the cells in a banana using household materials.
Follow a step-by-step scientific method to extract real DNA.
Observe and describe the DNA they’ve collected.
Record their process and reflect on their success.
Make connections between all living things and the molecules they share.

🧠 Why It Works

Learners are guided to:

Understand what DNA is and why it matters.
Follow a real extraction protocol step-by-step.
Think carefully about why each ingredient (salt, detergent, alcohol) plays a role.
Reflect on what worked, what didn’t, and how they might improve next time.

📦 What’s Included (in the full bundle):

Presentation slides – with key questions, glossary, and visual guidance.
Method worksheet – scaffolded planning and model example.
Results table – track visibility, layer separation, and technique.
Evaluation worksheet – 12-question grid for reasoning and reflection.
Leaderboard – class-wide comparison to prompt discussion.
Certificate – to celebrate careful, focused investigation.

All templates are:

Editable in Canva.
Provided in black-and-white printable versions.

🖇️ Template links are delivered in a PDF after purchase, so you can save, adapt and reuse easily.

🧪 What You’ll Need

No lab required — just care, focus, and scientific thinking.

You’ll need:

1 ripe banana
Warm water
Washing-up liquid
Table salt
Coffee filter or kitchen towel
Rubbing alcohol (cold, from the freezer)
A clear glass
A spoon

That’s it. Just household ingredients and a structured approach.

🗓️ When to Use It

Biology lessons: living things, cells and inheritance
Open evenings and science fairs
Cross-curricular science and literacy
Home education and kitchen science
Transition day activities or science club investigations

Explore the Full STEM Challenge Collection here

Includes all editable templates, model examples, printable versions, and certificate.