Why a checklist before every lab
A field site is the one place in a high-school education where a careless step can actually hurt someone. Fast water pulls, loose banks give way, and a hot afternoon far from shade does not forgive inattention. A pre-lab checklist is not bureaucracy — it is the routine that makes safe, prepared work automatic, so that on the day a field session goes sideways the student's hands already know what to do.
It also does something quieter: it forces the student to arrive ready. The most dangerous lab partner is the one who skimmed the procedure in the hallway. This checklist closes that gap. Print one for every experiment, work top to bottom, and do not step toward the water until the last box is checked.
Know the hazards, approved steps, measurement limits and what evidence could challenge your prediction. A result need not match the prediction to be valid.
The student learning pathways can use their supplied synthetic data. A table or worksheet is not evidence of performed fieldwork. Do not improvise electrical tests, combustion, radioactive-material work, pesticide applications, wildlife capture, microbial culture or sample ingestion.
1 — Safety
Nothing below this section happens until everything in it is done. No exceptions, every lab, every time.
- Weather checked and dressed for it — layers, rain gear, and sun protection matched to the forecast.
- Trained supervision and kit-specific procedure approved; protective eyewear, gloves and disposal match the reagent instructions. Gloves alone do not make an unknown sample safe.
- Sturdy closed-toe boots with grip; nothing loose that can snag on brush or catch the water.
- The site scouted for hazards — deep or fast water, unstable banks, poison ivy, and biting insects noted before anyone starts.
- Observe only from approved dry, stable ground; no wading, crossing currents, or reaching over banks. Use supplied records if safe access and appropriate supervision are unavailable.
- First-aid kit, drinking water, sunscreen, and insect repellent on hand — you know where each one is before you start.
- Sample bottles and used-reagent bags identified — you know exactly where each sample and leftover reagent goes.
2 — Setup
With safety confirmed, build the kit so the work flows without scrambling mid-survey.
- The full procedure read end to end — not skimmed — so you know what step comes next.
- All field gear gathered — quadrat, transect tape, sample bottles, and datalogger — checked and laid out in order of use.
- Water-test kit, meter, or measuring tape selected to match the precision the step requires.
- Meter or test kit calibrated and checked; you know which readings you need to record and to how many decimal places.
- Test-kit reagents located, labels double-checked against the procedure, and expiry dates confirmed.
- Sampling points marked and GPS or map ready — the route planned so no site is missed or reached twice.
- Lab notebook open to a fresh, dated page with the title and question already written.
3 — Readiness: the pre-lab questions
This is the section that separates a technician from a field scientist. Before the first measurement, the student should be able to answer these in writing — in the lab notebook, in their own words.
- What is the question? State, in one sentence, what this experiment is trying to find out or measure.
- What is the environmental science? Write the key relationship (or the process) the experiment depends on.
- What is my prediction? A specific, numerical expectation — the approximate reading, the expected trend between sites, the direction and rough size of the change.
- What am I measuring, and in what units? Name every quantity you will record, its unit, and its uncertainty.
- What could go wrong? Identify the one or two steps most likely to introduce error, and how you will minimize them.
- What does success look like? Know, before you begin, what a reasonable result would be — so an absurd number raises a flag in the field, not a week later.
A student who answers all six is not guessing their way through a recipe — they are running an experiment they understand, with a result they can already roughly predict. That is exactly the readiness the lab-notebook entry is built to capture, and the kind of preparation a lab defense is designed to reward.