Student Investigation Session

Overview

In this practical lesson, students conduct the approved investigation for the Cells: The Basis of Life unit. Working in groups of four to five, they collect reliable quantitative or qualitative evidence, maintain a scientific logbook and respond appropriately to safety or procedural issues under teacher supervision.

Learning intentions

Students will:

• conduct an approved biological investigation using a consistent procedure
• collect and record reliable quantitative or qualitative data
• identify safety risks and respond appropriately to unexpected procedural issues
• maintain a clear scientific logbook that supports later analysis and evaluation

Success criteria

• I can follow the approved procedure and explain the purpose of each main step.
• I can record observations and measurements accurately, including units where relevant.
• I can identify a safety or procedural issue and report or respond to it appropriately.
• I can maintain a complete logbook entry that another scientist could understand.

Curriculum links

• Students explain how cell structures enable biological processes needed for life, including through practical investigation of cells, their environments or biochemical processes.
• Students explain how cells, tissues and systems contribute to complex multicellular organisms when the investigation connects cellular processes to a larger biological function.
• Students identify the components of living things and their functions, where appropriate for students undertaking Life Skills adjustments.
• Students demonstrate ways to sustain living things through safe, responsible handling of biological materials and equipment, where relevant.

Lesson structure (60 minutes)

1. 0–5 min · Safety and purpose briefing. Teacher opens the investigation hook and safety slides, displays the investigation question and success criteria, checks attendance and assigns students to groups of four or five. Students listen, identify the investigation’s purpose and state one relevant safety expectation.

2. 5–12 min · Procedure and roles. Teacher revisits the approved method, demonstrates any critical technique and assigns roles such as equipment manager, method monitor, data recorder and safety monitor; distribute the scientific logbook and data recording sheet as a scaffold for individual logbooks. Students annotate their method, confirm their role and identify the independent, dependent and controlled variables where applicable.

3. 12–17 min · Risk check and prediction. Teacher supervises a brief group risk assessment, confirms required personal protective equipment and checks that each group’s equipment and procedure are appropriate before work begins. Students record hazards, control measures, a prediction or expected observation, and the type of evidence they will collect.

4. 17–42 min · Conduct investigation. Teacher circulates continuously, checks safe technique and procedural consistency, asks groups how they are improving reliability, and pauses the class if a common safety or method issue emerges; students carry out the approved investigation, complete repeated measurements or systematic observations, and record results immediately in their logbooks.

5. 42–52 min · Data quality and pack-up. Teacher prompts groups to inspect results for missing values, unusual observations, inconsistent units or procedural deviations, then supervises safe disposal, cleaning and equipment return. Students check that tables are titled and labelled, record anomalies and explain whether their evidence appears reliable enough to support a conclusion.

6. 52–60 min · Plenary and exit response. Teacher returns to the data-quality discussion and plenary slides and leads a short review of how cell structures or processes relate to the investigation. Students complete the final section of the scientific logbook and data recording sheet by answering: “What evidence did we collect?”, “What was one limitation or unexpected issue?” and “What would we improve next time?”

Resources

• the investigation hook, safety, procedure and plenary deck
• the scientific logbook and data recording sheet
• Approved investigation method and student group allocations
• Investigation equipment and biological materials
• Safety glasses, gloves, lab coats or other required protective equipment
• Disinfectant, paper towel, waste containers and equipment-cleaning materials
• Rulers, balances, thermometers, timers or other apparatus specified by the approved investigation
• Student books or digital logbooks
• Teacher risk assessment and emergency procedures

Assessment

• During the briefing, question students about the investigation purpose, variables, hazards and expected evidence before approving group commencement.
• During practical work, use observation to assess safe technique, role participation, accurate measurement, immediate recording and appropriate responses to procedural issues.
• Review logbook entries and the exit responses for complete data, suitable units, identification of anomalies, reliability judgements and a relevant connection to cellular structure or process.

Differentiation

• Provide the logbook scaffold, a worked example of a results table and sentence starters such as “The evidence suggests…” and “A limitation of our method was…”.
• Pair students strategically and allocate roles that allow participation through practical handling, observation, recording or reporting; provide enlarged instructions or a digital copy where required.
• For EAL/D students, pre-teach key terms such as variable, control, reliability, anomaly and hazard, with visual demonstrations and repeated teacher modelling.
• Extend confident students by asking them to justify the number of trials, calculate an appropriate summary such as a mean where relevant, or propose a modification that would improve validity or reliability.