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Grades 6–8 · Community science

Our Watershed, Our Data: community science on the class waterway

The whole class becomes a community science team, from species selection to public results.

Students act as a community science team: they select up to five species tied to a local water body's health, run a composite batching sampling protocol as a class, interpret the Field Journal results, and produce a public-facing summary aimed at protecting the site.

Start a Starter Kit quote

Grade band

Grades 6–8

Time required

5 class periods

Class size

20–32 students, one kit

Sample type

Water, one vial

Standards and outcomes

  • MS-LS2-4 — Construct an argument supported by evidence for how changes to physical or biological components of an ecosystem affect populations
  • MS-LS2-5 — Evaluate competing design solutions for maintaining biodiversity and ecosystem services
  • MS-ETS1-1 — Define the criteria and constraints of a design problem with sufficient precision to ensure a successful solution
  • Science & Engineering Practices — planning investigations, analyzing data, engaging in argument from evidence, communicating information

How one kit serves a whole class

The $200 Classroom Starter Kit provides one collection vial, targets up to five species, and returns results in 7–10 days for the class Field Journal. Because the whole class shares one sample, the class runs a composite batching protocol: multiple crews each collect a sub-sample from a different point along the waterway, and the sub-samples are pooled into a single vial, making the resulting data a genuine team effort that every student can speak to.

Choose one

Research tracks

Track A — Indicator Species Watch

Using species presence as a water health indicator

Driving question. Do pollution-sensitive species still live in our stretch of the waterway?

Species to pick. Up to five species that indicate water quality: a pollution-sensitive aquatic insect, a pollution-tolerant aquatic insect, a native fish, a sensitive amphibian, and a tolerant invertebrate for comparison.

What students take away. Students use the ratio of sensitive-to-tolerant detections as an indicator of local water quality, the same approach used by watershed monitoring groups.

Track B — Neighbors and Newcomers

Native and invasive species awareness

Driving question. Are there any invasive species present that the community should know about?

Species to pick. Two or three invasive species known to affect local waterways (an invasive fish, crayfish, or mollusk), paired with two or three native species they may be displacing, selected from a regional invasive species list.

What students take away. Students draft an early-alert style summary that could realistically be shared with a local conservation group.

Track C — What Would Protect This Place

Turning data into a protection recommendation

Driving question. Based on what we find, what would actually help protect this waterway?

Species to pick. A mixed list of five species chosen for their sensitivity to different threats (pollution, habitat loss, invasive competition), so the resulting data supports a range of possible protection recommendations.

What students take away. Students translate detection data directly into a short list of realistic, evidence-based protection actions.

The lesson sequence

Step by step, with teacher notes

  1. 01

    Becoming a community science team

    50 minutes

    Students learn what community science is and why it matters, then research and propose five species tied to the health of the local waterway. The class votes and every student records a written prediction along with why the site matters to the community.

    Teacher notes

    • Open with: "Real community scientists across the country are doing exactly this — collecting local data that professionals use. Today, that's us."
    • Bring in a real example of community science data being used by a local agency or conservation group, if one is available.
    • Require each species pitch to explain both a biological reason and why the community would care about the result.
    • Run the vote and record the final five species, along with a one-sentence 'why this matters' statement for each.
    • Flag any species clearly outside the five-slot or $200 kit limit and redirect before the vote.

    Materials

    • Example of local community science data or report
    • Whiteboard or shared doc for the vote
    • Prediction and rationale log sheet

    Student prompts

    • Why would this species matter to people who live near or use this waterway?
    • What would it tell the community if we detect this species? If we don't?
    • Who in our community might want to see this data once we have it?
  2. 02

    Composite sampling as a team

    55–60 minutes

    The whole class works together to fill one vial. Crews collect sub-samples from several distinct points along the waterway and pool them into a single composite sample, mirroring how real community science teams divide labor.

    Teacher notes

    • Say before any equipment is touched: "Gloves on first. Community scientists follow careful protocol so their data can be trusted — we're doing the same."
    • Pre-walk the site to mark three or four distinct sampling points reflecting different conditions (fast water, still water, shaded, sunny).
    • Assign every student a role — sampling, recording, chain-of-custody — so the whole class can say they contributed to the sample.
    • Model the pooling step yourself before letting students seal the composite sample.
    • Discuss briefly how professional community science groups handle site safety, and apply the same rules here.

    Materials

    • 1 classroom eDNA collection vial and prepaid mailer
    • Nitrile gloves (one pair per student minimum)
    • 3–4 sterile sub-sample cups
    • Thermometer and clarity tube (optional)
    • Field data sheet on clipboard

    Student prompts

    • Sampling crew — collects sub-samples from three or four distinct points along the waterway.
    • Recording crew — logs date, time, weather, temperature, and any visible pollution or disturbance.
    • Chain-of-custody crew — pools, seals, and labels the sample and prepares the return mailer.
  3. 03

    What community scientists do with data

    50 minutes, during the 7–10 day turnaround

    While the sample travels to the lab, students study how real community science networks collect, share, and use data, and preview how genetic detection results will appear in their own Field Journal.

    Teacher notes

    • Use this waiting period as a full lesson, not downtime — show how community science data has led to real environmental action in other places.
    • Diagram simply: sample collected → sent to lab → DNA matched against reference list → results returned to community.
    • Explain that a detection reflects genetic evidence recently present in the water, not a guaranteed sighting.
    • Show students a sample (redacted) Field Journal report so the format is familiar before the real reveal.
    • Discuss who could realistically use this data once the class has it — a teacher, a local group, a town website.

    Materials

    • Example of community science data leading to real action (article or case study)
    • Sample redacted Field Journal report
    • Vocabulary handout (detection, reference match, relative signal)

    Student prompts

    • How has community science data been used elsewhere to help protect a place?
    • Why is a genetic detection evidence of recent presence, not a live sighting?
    • Who in our community could use the results we're about to get?
  4. 04

    Reading the Field Journal together

    45 minutes

    The class reveals the Field Journal results together, compares them to predictions, and begins drafting what the data suggests about the waterway's current health.

    Teacher notes

    • Reveal results live and project them for the whole class to see and react to together.
    • Have students mark predictions as supported or not supported before discussing why.
    • Ask: "Based on this data alone, would you say this waterway needs help, or is doing okay?"
    • Require students to cite a specific relative signal value from the Field Journal when making any claim.
    • Introduce the final phase: turning this data into something the community could actually read and use.

    Materials

    • Class Field Journal report (projected)
    • Prediction log sheets from Phase 1
    • CER writing frame

    Student prompts

    • Which of your predictions were supported by the Field Journal results?
    • What is the strongest piece of evidence in this data about the waterway's health?
    • What is one thing this data cannot tell us, and why?
  5. 05

    Building a public summary for the community

    50 minutes

    Students turn their findings into a short, clear public-facing summary — something a neighbor, city council member, or local group could actually understand and use — including a recommendation for protecting the site.

    Teacher notes

    • Say: "Community scientists don't just collect data, they share it. Write this so someone with no science background can understand it."
    • Provide a simple template: what we did, what we found, what it means, what we recommend.
    • Push students to keep species jargon minimal and to translate 'relative signal' into a plain-language explanation.
    • Have a few groups read their summaries aloud and discuss which recommendations feel most realistic.
    • If appropriate, help the class actually send their summary to a local group, teacher website, or school newsletter.

    Materials

    • Public summary template
    • Class Field Journal report (for reference)
    • Poster paper or shared document for drafting

    Student prompts

    • What did we do, in plain language a non-scientist would understand?
    • What did we find, and what does it mean for this waterway?
    • What is one specific, realistic action that could help protect this site?

Student handout

For every student

Thinking prompts

  • State your prediction for each of the five target species before results are revealed.
  • Explain why each species matters to the community, not just to the ecosystem.
  • Describe, in order, the composite sampling procedure your crew followed.
  • Explain why a genetic detection reflects recent presence rather than a live sighting.
  • Predict one species you expect NOT to be detected and explain why.
  • After the reveal, identify which predictions were supported and which were not.
  • Draft one sentence of your public summary explaining the results in plain language.

Data sheet

  • Date and time of collection:
  • Site name and description:
  • Water temperature, flow, and clarity:
  • Weather conditions on collection day:
  • Number and location of sub-samples collected:
  • Any visible pollution, trash, or disturbance noted:
  • Target species list with pre-reveal predictions:

Discussion questions

  • Why does sharing data with the community matter as much as collecting it?
  • What does 'relative signal' mean, and why should a public summary avoid overstating it?
  • How could this data be useful to a local group working to protect the waterway?
  • What would you want to test next if the class ran this project again?

Field checklist

  • Nitrile gloves worn before touching any sampling equipment.
  • Sub-samples collected from at least three distinct points along the waterway.
  • Date, time, temperature, and weather conditions recorded.
  • Any visible pollution or disturbance noted on the data sheet.
  • Sample pooled, sealed, and labeled without touching the inside of the vial.
  • Predictions recorded in writing before results were revealed.

Analysis

CER: What does our data say about protecting this waterway?

  1. 1.Claim — write one sentence stating what the results suggest about the waterway's current health.
  2. 2.Evidence — cite specific detections, relative signal values, and field conditions from the Field Journal.
  3. 3.Reasoning — explain how the presence or absence of each species connects to water quality or habitat health.
  4. 4.Recommendation — state one specific, realistic action that could help protect this site based on the evidence.

Assessment

20-point rubric

Species selection and community rationale

5 pts

Each of the five species is chosen with a clear biological reason and a clear connection to community relevance.

Field procedure and data logging

5 pts

Composite sampling steps were followed correctly and site conditions fully recorded.

Data interpretation

5 pts

Field Journal results, including relative signal, are read and explained accurately.

Public summary and recommendation

5 pts

The public-facing summary is clear, avoids overstated claims, and includes a specific, realistic recommendation.

Go further

Extensions

  • Actually send the class's public summary to a local watershed group, town office, or school newsletter.
  • Compare this site's results with a partner class sampling a different local waterway.
  • Invite a local community science coordinator or watershed group member to review the class's findings.
  • Have students design a follow-up kit order targeting species suggested by this round's surprise results.

For the teacher

Answer key and misconceptions

  • Expected: most classes detect at least a few of their five target species; zero detections should prompt discussion of possible habitat mismatch, not be treated as an error.
  • Common misconception: 'no detection means the species is definitely gone from the area.' Correct framing: eDNA reflects a probability of recent presence at the sampling site and moment, not certainty of absence.
  • Common misconception: 'more signal always means a bigger population.' Correct framing: relative signal reflects the amount of DNA shed into the water, which is influenced by size, recent activity, and timing.
  • Expected: students should be able to explain why public summaries must avoid overstating results, distinguishing between what genetic detection data can and cannot prove.

Ready to run it with your class?

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