Investigating River Health

Overview

In this sixth lesson of Collie River Animal Guardians, students investigate features that indicate river habitat health. Through a simulated or supervised field investigation, they make careful observations, record evidence in a table and identify one positive sign and one concern. This builds on prior learning about river animals, habitats and caring for Country/Place.

Learning intentions

Students will:

• WALT collect and record observations about a river habitat.
• use words, numbers and drawings to record evidence.
• identify features that may show a healthy or unhealthy habitat.
• work safely and cooperatively during an investigation.

Success criteria

• I can make careful observations using my senses safely.
• I can record data using words, numbers or drawings.
• I can identify one sign of a healthy habitat.
• I can identify one concern and support my idea with evidence.

Curriculum links

• Science — writing and creating texts to communicate scientific findings and ideas for an identified audience.
• Science — planning and conducting investigations using a scaffold, including safe use of materials and equipment.
• HASS — explaining the importance of environments, natural vegetation and water sources to people and animals in Australia.
• Mathematics — interpreting and recording measurements using appropriate units and scaled or digital instruments, where measurements are included.

Lesson structure (60 minutes)

1. 0–7 min · Hook and purpose. Teacher opens the river health hook and learning intention slides with a striking before-and-after image of a clean riverbank and a littered riverbank, then asks, “What evidence could tell us whether a river habitat is healthy?” Students think independently, share with a partner and contribute observable features such as clear water, plants, animal tracks or rubbish.

2. 7–15 min · Model careful observation. Teacher uses the observation modelling slides to introduce the five observation categories: water clarity, vegetation, litter, animal evidence and shelter. Model the difference between an observation (“three pieces of plastic are beside the water”) and an opinion (“the river is bad”), and demonstrate how to record a number, short phrase or labelled drawing. Students practise converting one opinion into an evidence-based observation.

3. 15–20 min · Safety and investigation briefing. Teacher explains the investigation locations or prepared stations and demonstrates safe behaviour: stay with the group, remain with the adult, do not taste or touch water, avoid disturbing animals and wash hands afterwards. Teacher distributes the dyslexia-friendly river health observation table and clarifies that groups will record evidence rather than make unsupported judgements. Students form pairs, select a recorder and observer, and make a prediction about what they may find.

4. 20–42 min · Investigation stations. Teacher guides pairs through five supervised stations or a simulated investigation using photographs, trays and safe materials. At each station, prompt students to observe and record what they see, including a count where useful. Students complete the table for water clarity, vegetation, litter, animal evidence and shelter using checkboxes, words, numbers and/or drawings. Rotate roles halfway through so every student makes observations and records data. If outdoor access is unavailable, use photographs, short video clips, clear containers of water, leaves, bark, model tracks, safe litter examples and shelter pictures.

5. 42–52 min · Compare evidence. Teacher brings the class together and displays the class data discussion slides. Invite pairs to report one observation, recording common findings on the board. Ask: “Which observations suggest a healthy habitat?”, “What is a concern?”, and “What evidence supports your idea?” Students compare results with another pair and identify one healthy sign and one concern on their worksheet.

6. 52–60 min · Plenary and exit response. Teacher uses the reflection and exit prompt slide to revisit the WALT. Students complete the final response on the worksheet: “One sign of a healthy river habitat is ___ because I observed ___.” They add, “One concern is ___ because I observed ___.” Invite two or three students to share, then collect worksheets for assessment.

Resources

• One slide deck covering the hook, learning intention, observation categories, modelling, safety, station instructions, class data discussion and exit prompt
• One river health observation worksheet with a simple table
• Clipboards and pencils
• Large-print, pictorial observation checklists
• Prepared investigation stations or river habitat photographs
• Clear containers of water with safe contrasting samples
• Natural materials such as leaves, bark and sticks
• Clean, safe examples of litter
• Hand sanitiser or access to soap and water
• Camera or tablet, if available, for recording observations

Assessment

• During modelling, check whether students can distinguish an observation from an opinion and name at least two useful evidence categories.
• During the investigation, observe safe behaviour, partner collaboration and the accuracy of recorded observations. Prompt students to add counts, labels or specific descriptive words.
• Use the final worksheet responses to assess whether students can identify one healthy sign and one concern, each supported by evidence.

Differentiation

• Support learners with prepared stations, visual checklists, picture symbols, sentence starters such as “I observed…” and “This may show…”, adult guidance and partner recording.
• Provide dyslexia-friendly options: clear sans-serif large-print tables, minimal copying, checkboxes, extra spacing, clipboards, oral recording or scribing, and permission to use labelled drawings instead of extended writing.
• Support EAL/D learners with photographs, gestures, repeated modelling and a small word bank including vegetation, shelter, litter, clarity and evidence. Allow observations to be spoken before recording.
• For students unable to access the field site, provide equivalent photograph, video or table-top stations. Follow local risk-management procedures and do not collect or handle unknown water or living organisms.

Extension

• Students create a simple rating scale for each category, such as 1–3, and justify the score using recorded evidence.
• Students combine class results into a picture graph or column graph, then explain one limitation, such as a small sample, different observation locations or observations collected at only one time.