Helicopter Science

Overview

This two-lesson sequence introduces variables and the scientific method through a paper-helicopter investigation. Students move from identifying variables and making predictions to planning, conducting, analysing and evaluating a fair test, while connecting force, motion and air resistance to evidence-based scientific inquiry.

Learning intentions

• WALT identify independent, dependent and controlled variables.
• WALT use a hypothesis and method to plan a fair test.
• WALT collect, represent and interpret reliable data.
• WALT evaluate the validity of a conclusion using evidence.

Success criteria

• I can identify what I change, measure and keep the same.
• I can write a testable hypothesis and a safe, repeatable method.
• I can record repeat-trial data and calculate a mean where appropriate.
• I can explain whether my evidence supports my claim and identify limitations.

Curriculum links

• Science — Motion and Forces: measuring and comparing forces in practical contexts.
• Science — independent scientific inquiry: planning investigations, collecting evidence and evaluating data quality.
• Science — model-based thinking: using a paper-helicopter model to explain motion and air resistance.
• Science capabilities and competencies: thinking, managing self, participating and contributing, and using language, symbols and texts.

Lesson structure (Lesson 1 — 75 minutes)

1. 0–8 min · Mystery hook. Open with the mystery investigation slides and drop two differently designed paper helicopters from the same height. Students silently predict which will land first, then justify their ideas to a partner.
2. 8–20 min · Explicit teaching and modelling. Model a simple classroom investigation, thinking aloud while labelling the independent variable (what is changed), dependent variable (what is measured), controlled variables (what stays the same), hypothesis, fair test, reliability and validity. Students annotate these terms on the two-lesson investigation worksheet.
3. 20–28 min · Variables challenge. Display three quick scenarios on the variables challenge slides. Students use mini-whiteboards to identify the independent and dependent variables; pairs then suggest two controlled variables. Address the misconception that “control variable” means a control group.
4. 28–33 min · Energising brain break. Run “Variable Corners”: label four corners independent, dependent, controlled and not a variable. Read statements such as “height of drop” or “time to land”; students move to the corner they choose, then explain their reasoning.
5. 33–58 min · Procedural-writing task. In groups, students write a clear, detailed method for making a jam sandwich. Their method must have a title, numbered ordered steps, imperative verbs, sequencing language and precise detail. The teacher then follows each group’s method exactly, pausing to identify ambiguity, missing steps or unclear instructions. The class discusses and improves the methods so that another person could repeat them successfully.
6. 58–69 min · Investigation planning. Model turning a question into a testable hypothesis and method. Groups choose one variable to investigate, complete the planning table on the investigation planning page, and conference with the teacher before testing.
7. 69–75 min · Plenary check. Students complete the Lesson 1 questions on the reflection and vocabulary check. Briefly link the sandwich-method task to scientific methods: precise instructions support repeatability, and consistent methods help make a fair test. Collect responses or use a show-me check to identify students needing support in Lesson 2.

Lesson structure (Lesson 2 — 75 minutes)

1. 0–8 min · Retrieval and set-up. Revisit the retrieval and fair-test slides. Students define the three variable types and explain why repeat trials improve reliability; teacher addresses common errors from Lesson 1.
2. 8–18 min · Teacher modelling. Model one complete trial: release the helicopter without pushing, time its fall, record units, and reset consistently. Think aloud about validity, reliability, anomalous results, safe practice and why only one variable should change.
3. 18–23 min · Finalise method and safety check. Groups use the method and safety checklist to refine their question, hypothesis, equipment list and numbered method. The teacher approves methods before equipment is collected.
4. 23–48 min · Conduct the fair test. Groups of three work as launcher, timer and recorder, rotating roles. They complete at least five repeat trials, record results in seconds, and note anomalies or procedural changes. Use the practical testing slides for role reminders and time prompts.
5. 48–60 min · Process and represent data. Students calculate a mean falling time where suitable and create a labelled table or dot plot on the results and data-analysis page. Groups compare patterns and identify whether their data is consistent.
6. 60–70 min · Evaluate evidence. Groups answer the evaluation prompts on the conclusion and evaluation page: claim, evidence, reliability, validity, limitation and improvement. Prompt with: “What does your evidence show?” and “What could make your conclusion stronger?”
7. 70–75 min · Exit ticket. Use the plenary slides. Students submit: one example of each variable type, whether their evidence supports the hypothesis, and one improvement to increase reliability or validity.

Resources

• One slide deck, the complete two-lesson slide deck
• One two-lesson printable worksheet, the two-lesson investigation worksheet
• A4 paper, scissors and rulers
• Stopwatch or timer per group
• Measuring tape or metre rulers
• Mini-whiteboards and pens
• Masking tape or floor markers for drop zones
• Safety goggles if helicopters are dropped near faces or from elevated positions
• Calculator or spreadsheet access, if available

Assessment

• Listen to partner explanations, mini-whiteboard responses and corner justifications to assess variable vocabulary.
• Check each group’s hypothesis, variable identification and method before practical work; question students about control, reliability and validity.
• Assess the completed data table, mean, conclusion and evaluation, plus the exit ticket, for evidence-based reasoning.

Differentiation

• Provide a word bank, labelled example, sentence starters (“I changed…”, “I measured…”, “I kept… the same”) and a partially completed planning table for students needing support or using English as an additional language.
• Pair students strategically and assign rotating roles; offer pre-cut helicopter templates or teacher assistance with folding and timing for students with fine-motor or organisational needs.
• Accept spoken explanations, annotated diagrams or typed responses where writing is a barrier.
• Extend students by asking them to compare mean and range, explain an anomalous result, graph their data, or propose a follow-up investigation testing a second factor while maintaining validity.
• Safety: demonstrate dropping from a marked zone, keep scissors pointed down and walk while carrying equipment; no throwing, pushing or standing on furniture. Stop testing if helicopters enter another group’s space.