Why a checklist before every lab
A hands-on health-science day rewards a student who arrives prepared and quietly punishes one who doesn’t. Food gets handled, data gets recorded, and a measurement is only as good as the care taken setting it up. A pre-lab checklist is not bureaucracy — it is the routine that makes clean, prepared, food-safe work automatic, so that on Investigation Day the student’s hands already know what to do.
It also does something quieter: it forces the student to arrive ready. The least useful lab partner is the one who skimmed the procedure in the hallway. This checklist closes that gap. Print one for every Investigation Day, work top to bottom, and do not begin the hands-on work until the last box is checked.
The goal is not to follow rules. It is to walk to the bench already knowing the steps, the measurements, and the result you expect.
1 — Workspace & food safety
Nothing below this section happens until everything in it is done. No exceptions, every Investigation Day, every time.
- Hands washed and a clean, clear workspace — surfaces wiped down before any food or samples come out.
- Food handled safely — clean utensils, long hair tied back, and any allergies checked before tasting or testing anything.
- Food-test reagents, where a test uses them (iodine, Benedict’s solution, indophenol), kept well away from anything meant to be eaten — test samples are never snacks.
- The procedure’s simple safety notes read for any reagent in use — iodine stains, Benedict’s needs gentle warming — and handling noted.
- The workspace ventilated and any heat source (a hot-water bath for a Benedict’s test) set up safely, away from clutter.
- Soap, water, and paper towels within reach — you know where and how to clean up a spill before you start.
- Disposal planned — you know exactly where food scraps, used test samples, and any reagents go when you’re done.
2 — Setup
With the workspace ready, build the bench so the work flows without scrambling mid-investigation.
- The full procedure read end to end — not skimmed — so you know what step comes next.
- All equipment gathered and clean — a food scale, measuring cups, and test tubes where a food test needs them — laid out in order of use.
- A food scale, measuring spoons and cups, or a stopwatch selected to match the precision the step requires.
- Food scale located and tared to zero; you know which measurements you need to record and to what precision.
- Nutrition labels and any datasets printed or open, and the foods or samples for the day gathered and checked against the procedure.
- A heart-rate monitor or stopwatch ready where the day measures fitness, and any warm-water bath for a food test set up safely.
- 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 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 investigation is trying to find out or measure.
- What is the science? Write the key relationship or idea the investigation depends on.
- What is my prediction? A specific, numerical expectation — the approximate value on the scale, the expected result of a food test, or the rough size of the change you’ll see.
- 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 at the bench, not a week later.
A student who answers all six is not guessing their way through a recipe — they are running an investigation 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.