Techniques · Field course

Question Test Repeat

A practical crash course in scientific research: ask a useful question, make a fair test, and leave a record another person can follow.

Read in short sessions. Learn with worked examples even when equipment is not available.

From question to evidenceAn observation leads to a focused question, a prediction, and a measurable outcome.observemeasure
Field diagramA question becomes a test

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The curriculum

Seven modules, one dependable habit of mind.

Follow the sequence for the crash course, or use the library below when you need a focused reference.

  1. 01

    Question

    Ask a useful question

    Turn curiosity into a question evidence can answer.
    3 lessons
  2. 02

    Question

    Design a trustworthy test

    Make comparisons that mean what you think they mean.
    4 lessons
  3. 03

    Test

    Prepare the work

    Build safe habits and records you can trust.
    3 lessons
  4. 04

    Test

    Measure & handle materials

    Practice the essential skills of a careful laboratory.
    5 lessons
  5. 05

    Test

    Check the quality

    Know when a measurement is fit for its purpose.
    3 lessons
  6. 06

    Repeat

    Make sense of results

    Show the evidence, acknowledge variation, and avoid overclaiming.
    3 lessons
  7. 07

    Repeat

    Make it repeatable

    Share a useful record and ask a better next question.
    3 lessons

Find a technique

Build your working library.

Glossary & resources
Course path
Module 2Concept

Variables, controls, blanks, and standards

Map what changes, what is held steady, and what reference checks reveal before trusting a comparison.

Estimated reading
11 min
Estimated practice
25 min
Needs
Paper or spreadsheet; supplied water-volume or measurement dataset.
Open lesson
Module 3Practice

Notebooks, labels, raw data, and method versions

Create a record that another person can reconstruct without erasing the original observations or method context.

Estimated reading
12 min
Estimated practice
25 min
Needs
Bound notebook or versioned digital template; water-only sample labels; supplied dataset.
Open lesson
Module 4Practice

Reading a meniscus and choosing volumetric glassware

Read a water meniscus at eye level and choose a vessel whose calibration, range, and purpose match the question.

Estimated reading
13 min
Estimated practice
30 min
Needs
Clear graduated cylinder, volumetric flask or pipette if available, clean water, eye-level support, notebook, and optional dark background.
Open lesson
Module 4Practice

Pipette selection and liquid transfer

Choose a pipette for the volume and liquid, then transfer water with a repeatable hand position and documented checks.

Estimated reading
8 min
Estimated practice
15 min
Needs
Adjustable air-displacement micropipette, compatible tips, clean water, receiving tubes, rack, timer, and a balance only if an approved gravimetric check is available.
Open lesson
Module 4Practice

Balance use, tare, and weighing

Make a stable, traceable water or container weighing while separating the balance reading from the conclusion you draw.

Estimated reading
8 min
Estimated practice
15 min
Needs
Laboratory balance with a current manufacturer instruction, level and stable bench, clean dry container, room-temperature water, and a notebook.
Open lesson
Module 4Practice

Concentrations, dilution calculations, and labels

Keep amount, volume, units, and final-volume assumptions visible when planning a water-based dilution on paper.

Estimated reading
9 min
Estimated practice
15 min
Needs
Calculator, paper or spreadsheet, dilution worksheet, and clean labeled water containers only if a supervised water demonstration is performed.
Open lesson
Module 5Practice

Deviations, troubleshooting, and suspect results

Turn an unexpected observation into a bounded investigation with a preserved raw record and a justified next action.

Estimated reading
8 min
Estimated practice
12 min
Needs
Notebook, deviation form, instrument and method records, clean water for a controlled demonstration, and approved cleaning materials.
Open lesson
Module 6Concept

Variation, uncertainty, and comparison

Distinguish repeatability, accuracy, standard deviation, standard error, and measurement uncertainty before comparing two results.

Estimated reading
9 min
Estimated practice
15 min
Needs
Calculator or spreadsheet and supplied repeated-measurement dataset.
Open lesson
Module 7Concept

Reporting limitations, citations, and conclusions

Write a report that tells readers what was measured, what supports the conclusion, and what remains uncertain or out of scope.

Estimated reading
9 min
Estimated practice
12 min
Needs
Supplied practice result, reporting checklist, source list, and raw-data summary.
Open lesson

Course content v1 · September 18, 2026. Practical work must follow the applicable manufacturer instructions and local safety requirements.