Correction Policy
We welcome reports of arithmetic errors, outdated guidance, broken links and accessibility problems. Send the affected URL, a short explanation and a reproducible example through the contact form.
Reviewing reports
The administrator should reproduce a reported result and compare the formula with the stated assumptions. For an institutional rule, include a link to an official document when possible. Do not attach personal transcripts or confidential records.
Making corrections
Confirmed errors should be corrected in both code and explanatory content. Relevant test cases should be added or rerun. A material correction should explain what changed so readers can understand the impact on earlier results.
Unresolved differences
Some differences arise from rounding, excluded coursework or a different grading policy. We should explain those distinctions rather than silently changing an example to match a single report.