KS3 Electronics & micro:bit: Lesson 2 – Breadboards (Layout, Connections & Real-World Circuits)

KS3 Electronics – Understanding & Using Breadboards (2026 Updated) | Tinkercad + micro:bit Practical Lesson | Dyslexia-Friendly

Fully resourced, dyslexia-friendly KS3 Electronics lesson teaching students how to understand and use breadboards, both in Tinkercad and with real physical components.

This lesson bridges digital simulation and hands-on hardware, making it ideal for practical classrooms, STEM clubs and non-specialist teachers delivering electronics for the first time.

Students Learn:

• What a breadboard is and why engineers use them
• How breadboard rows, columns and power rails are internally connected
• How to correctly place LEDs, resistors and jumper wires
• How to build and test a working circuit using a micro:bit as a power source
• How to simulate and troubleshoot circuits in Tinkercad (free online)

Lesson Activities:

• Starter: “Crack the Circuit” challenge to develop circuit fluency
• Video demonstration exploring which holes are connected beneath the breadboard
• Diagram annotation task to show internal connections
• Step-by-step Tinkercad build activity
• Interactive quiz to secure understanding
• Real-world task: physically build the same circuit powered by a micro:bit

Practical Skills Developed:

• Safely powering circuits using a micro:bit
• Correct LED polarity (anode and cathode)
• Understanding resistor placement and current control
• Using breadboards to prototype without soldering
• Translating digital simulations into physical builds

Challenge Extension:

• Use an online circuit diagram editor to produce a formal engineering circuit diagram
• Screenshot evidence for assessment
• Encourages professional documentation and real-world engineering workflow

Lesson Objectives:

• Know the appearance and layout of a breadboard
• Understand how breadboard connections work internally
• Use a breadboard effectively in Tinkercad
• Build and test a working physical circuit

What’s Included:

• Fully editable PowerPoint (dyslexia-friendly layout, clear visuals, low clutter)
• Scaffolded worksheet with guided build steps
• Practical instructions for classroom builds
• Quiz and retrieval tasks
• Screenshot assessment tasks
• Teacher guidance for troubleshooting

Perfect For:

• KS3 Computing
• KS3 Electronics
• Design & Technology (Electronics units)
• micro:bit introduction lessons
• STEM clubs and practical engineering sessions

Clear, practical and confidence-building — this lesson helps students move from simulation to real electronics with structured support and real engineering thinking.