STEM REASONING AND EVIDENCE WORKBENCH
Classify anonymous item facility and summarize item-count and point-weighted distribution with uncertainty evidence.
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
Facility percent equals correct divided by attempted times one hundred. Values at or below the hard maximum are hard, values at or above the easy minimum are easy, and values between are moderate. A 95 percent Wilson interval shows binomial sampling uncertainty. Points are summed by observed band for weight shares. A supported band claim matches the entered threshold rule for this cohort and administration. Facility is descriptive and can change with instruction, access, sample composition, scoring, and item wording. Use the intervals, point weights, learner explanations, distractor evidence, standards map, and another administration before revising the assessment.
Confirm the question, approved source, units, notation, signs, response coding, model assumptions, and review threshold. Keep an unchanged copy of measurements or learner evidence.
Run the worked example, inspect every intermediate row, and compare the result with a hand calculation, diagram, representation, periodic table, or approved laboratory method.
Record the method, assumptions, uncertainty, units, classifications, and flagged rows. Verify the editable report independently before instruction, assessment, or laboratory use.
How to interpret the result
Use after scoring to inspect how observed facility and assessment points are distributed across teacher-defined bands. It does not estimate item-response parameters, prove cognitive demand, compare groups fairly, diagnose learners, validate standards alignment, adjust for guessing, or authorize high-stakes item removal.
Twenty-seven of thirty makes the recall item 90 percent and easy. Eighteen of thirty is moderate, and nine of thirty is hard under the 35 and 85 thresholds. Twenty-four of thirty is 80 percent and therefore moderate, so its supplied easy label is flagged. Point shares reveal that this reviewed item carries forty points.
Facility percent equals correct divided by attempted times one hundred. Values at or below the hard maximum are hard, values at or above the easy minimum are easy, and values between are moderate. A 95 percent Wilson interval shows binomial sampling uncertainty. Points are summed by observed band for weight shares.
A supported band claim matches the entered threshold rule for this cohort and administration. Facility is descriptive and can change with instruction, access, sample composition, scoring, and item wording. Use the intervals, point weights, learner explanations, distractor evidence, standards map, and another administration before revising the assessment.
Do not call an easy item low quality, equate difficulty with cognitive demand, divide by enrollment instead of attempts, hide missing responses, compare unlike cohorts, ignore point weight, or remove an item from one small sample. Verify scoring and alignment, inspect distractors and access barriers, and protect small cells.
Learning boundary
This browser-local workbench applies only the disclosed rules. It cannot diagnose a learner, certify an experiment, establish a chemical structure, 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 school-approved system.
No. It describes entered evidence under one disclosed rule. Compare several evidence sources and ask for reasoning before drawing a conclusion.
Treat it as an editable calculation aid. Show your own reasoning, cite required sources, and follow the course method and academic-integrity rules.
YOUR NIRMION
