STEM PRACTICE AND EVIDENCE WORKBENCH
Group planned variables by investigation, test a disclosed control structure, and audit ready or review classifications.
Review output
Load the worked example to inspect realistic inputs, or enter anonymous classroom or laboratory evidence. Results remain in this browser tab until you copy or download them.
Transparent method
A plan is locally ready when it contains exactly one independent and one dependent variable, at least the entered number of control variables, every control is marked held constant, and neither focal variable is marked constant. One repeated claim per plan is compared with that conjunction; no average hides a missing requirement. Supported means the plan classification matches this structural screen. Review means the table identifies a count or held-status problem, not that the scientific question is invalid. A teacher must still examine measurement validity, feasible ranges, comparison groups, replication, confounding, access, safety, and the actual protocol.
Confirm the question, source, units, notation, response coding, model assumptions, and review threshold. Keep an unchanged copy of the original evidence.
Run the worked example, inspect every intermediate row, and compare it with a hand calculation, diagram, representation, or approved subject method.
Record the method, assumptions, units, classifications, and flagged rows. Verify the editable report independently before educational or laboratory use.
How to interpret the result
Use during planning or teacher review of a simple controlled investigation. It makes missing focal variables and controls that are not actually held visible. It does not prove causal identification, choose operational definitions, detect every confounder, design randomization, assess ethics or hazards, or validate an observational study.
The pendulum and reaction-rate plans each contain one independent variable, one dependent variable, and two controls marked held, so their ready claims are supported under the entered rule. The plant-growth plan lists water as a control but marks it not held, so its repeated ready claim conflicts and the specific row remains visible.
A plan is locally ready when it contains exactly one independent and one dependent variable, at least the entered number of control variables, every control is marked held constant, and neither focal variable is marked constant. One repeated claim per plan is compared with that conjunction; no average hides a missing requirement.
Supported means the plan classification matches this structural screen. Review means the table identifies a count or held-status problem, not that the scientific question is invalid. A teacher must still examine measurement validity, feasible ranges, comparison groups, replication, confounding, access, safety, and the actual protocol.
Do not call every measured quantity independent, mark the dependent variable constant, list equipment without stating what is controlled, assume a named control stayed constant, confuse a control variable with a control group, expose student identifiers, or treat the checklist as proof of causation. Tie each variable to the question and method.
Learning boundary
This browser-local workbench applies only the disclosed rules. It cannot diagnose a learner, certify an experiment, or replace teacher, laboratory, and safety judgment.
Review checklist
Practical questions
No. Processing occurs in the current browser tab. Avoid personal information and retain authoritative records only in the approved school system.
No. It describes entered evidence under one disclosed rule. Review reasoning, uncertainty, access, and several evidence sources.
Treat it as an editable calculation aid. Show your own reasoning, cite required sources, and follow course and academic-integrity rules.
YOUR NIRMION
