Web and Windows · learn by investigating

First a question. Then, a testable prediction.

Choose a pathway, distinguish simulations from public data, and export your reasoning and decisions.

Guide reviewed · 7 November 2026 · DiffAtOnce Academy 1.3.1 · Calculation times depend on data and hardware.

  1. Choose browser or Windows

    Open Academy from the website or verified Windows package. The web edition does not need a laboratory account. Choose Español or English; these workspaces are separate from Prime and ResinAtOnce.

    Before continuing: Opening Academy does not import or modify scientific projects from other applications.

  2. Start with a question and a pathway

    Use Research for a continuous case, Lesson for a specific topic, or Doctoral for an advanced activity. Read objective, preparation and conditions before changing a parameter.

    Before continuing: A method-catalogue entry does not imply that algorithm is executed or available in every application.

  3. Identify the data you are viewing

    Distinguish a virtual case from a public experimental file. Under Public data review attribution, licence, manifest and encoding limits; a real source does not replace missing metadata.

    Before continuing: Do not interpret nominal or simulated values as a new calibration or spectrometer measurement.

  4. Predict before viewing the control

    Follow Calibrate → Design → Acquire → Process → Interpret. Change one parameter at a time, write what you expect to observe, and compare prediction, residual and sensitivity against the identified control.

    Before continuing: A convincing visual fit does not establish identifiability, absence of bias or experimental calibration.

  5. Justify limitations and uncertainty

    Use Derivations, Uncertainty and Defence and review to explain assumptions and estimator target. Distinguish a monoexponential interval from the uncertainty of an ILT distribution or apparent mass.

    Before continuing: Web documentary guidance and local Windows Beatrix are not the same mechanism; their responses do not change deterministic equations.

  6. Export your portfolio and progress

    Retain decisions, notes, results and sources using the export controls of your workspace. Save a copy before updating or changing device: progress depends on course version and content.

    Before continuing: Another tab is neither synchronisation nor a backup. Content review does not establish measured educational effectiveness.

WHEN COMPLETE

Your result should be reopenable and explainable.

Retain source, project, review, recipe, factors, findings and report. If a criterion fails, retain its reason too. Professional formatting and cross-application agreement do not replace scientific review.

Open complete help →Current features and limitationsRequest help with the exact message

Usage documentation; it neither runs calculations, changes projects nor experimentally validates a method. Historical screenshots in complete help retain their version and provenance.