Micro:bit Science Builders

Overview

Today students learn the basics of using BBC micro:bits and apply them to a simple science investigation: building and running a “light-sensor” indicator that responds to brightness. This lesson builds understanding of using technology safely and accurately to support scientific thinking and recording observations.

Learning intentions

Students will:

• learn how to power on, connect, program, and upload to a micro:bit
• build a small program that displays a symbol based on light level
• use accurate science language to describe observations and patterns
• revise their program after testing to improve it

Success criteria

Students can:

• connect a micro:bit and upload a program successfully
• identify which parts of the program control input (light) and output (display)
• explain what happens to the micro:bit display as brightness changes
• make a modification and test it again (with support if needed)

Curriculum links

• Science — investigating and using tools safely to gather data and make observations (Science K–10 outcomes, Stage 2 focus on hands-on investigation and recording)
• EN2-CWT-02 — plan, create and revise written texts for informative purposes using text features and sentence-level grammar and punctuation (short science explanation in worksheet)
• EN2-CWT-01/03 (supporting choice) — use informative writing to explain what was tested and what was found
• Digital technologies as a support skill for using the micro:bit as a tool for data collection and communication (integrated in science inquiry)

Lesson structure (50 minutes)

1. 0–7 min · Hook & rules. Teacher displays a live example (micro:bit placed near a torch) showing the display change, asks: “How can we use a micro:bit to help us notice changes in our world?” and sets safety expectations (no licking batteries, careful handling, cables connected with permission). Students watch and share one prediction using sentence starters (“I think it will… because…”).

2. 7–18 min · Direct teach: micro:bit basics. Teacher walks through the steps using the micro:bit setup and light input slides: turning on, connecting, locating the input (light sensor), and uploading a simple brightness-to-display program; teacher models “test, observe, adjust”. Students follow along at their bench with the same steps and confirm by checking that their micro:bit updates when brightness changes.

3. 18–30 min · Build 1: light indicator program. Teacher distributes the micro:bit light investigation worksheet to pairs and guides students to copy the program blocks that map brightness ranges to two display outcomes (for example, “sun” for brighter, “moon” for darker). Students run the program, test under bright and dim conditions, and record observations (what they saw on the screen).

4. 30–40 min · Investigate: change one variable. Teacher prompts a fair test: same distance from the light source, change only brightness (cover/uncover the torch shade or move the torch closer/farther in a controlled way). Students complete a quick table on the micro:bit light investigation worksheet with 2–3 brightness trials and describe the trend using one informative sentence.

5. 40–47 min · Revise and troubleshoot. Teacher returns to the micro:bit setup and light input slides to show common fixes (upload again, ensure light sensor block selected, confirm the correct input/output blocks). Students update one small part of the program (adjust brightness threshold or symbol choice), test again, and note what changed.

6. 47–50 min · Plenary & exit check. Teacher collects the micro:bit light investigation worksheet before students leave. Students do a 30-second verbal “science share” in groups: “Our micro:bit showed ____ when brightness was ____. We changed ____ and it improved because ____.”

Resources

• the micro:bit setup and light input slides
• the micro:bit light investigation worksheet
• 1 micro:bit per pair (or shared if needed), plus USB cable/charging lead
• Torch or desk lamp for controlled lighting trials
• Micro:bit power/connection method used in school (teacher-selected; e.g., USB to laptop)
• Student device access for micro:bit programming (laptops/tablets)
• Micro:bit quick reference cards (teacher-prepared, if available)
• Wall/bench markers to keep test distance consistent
• Optional: cloth cover or paper sheet to create a dim condition
• Timer to manage trial steps

Assessment

• Formative teacher checks during building: students show that they can upload and that display responds to brightness.
• Worksheet review: observations and trend sentence are clear, accurate, and use science words (brightness, light level, brighter/darker).
• Exit plenary: quick verbal check that students can explain what they changed and why.

Differentiation

• Support: provide sentence starters on the micro:bit light investigation worksheet (“When it was brighter, the micro:bit showed…”) and a simplified block-choice list.
• Support: assign clear roles in pairs (Programmer, Tester, Recorder) and use “test before changing” prompts.
• Extension: students add a third brightness range (three outputs) and explain which threshold they adjusted and the pattern they observed.
• EAL/SEN: allow diagram-only recording of observations and provide a word bank (brighter, darker, sensor, display, changed).