Reference

Opening instructions and verification evidence

Open index.html in the delivered study-site folder. The lessons, worked solutions, original crops, data tables, local font and equations are included. No installation, login or internet connection is needed. Keep the entire folder together; moving only index.html breaks its relative asset links.

Opening and static hosting

For direct local use: open index.html with a modern browser. Start Here leads through foundations, worked methods, independent practice and the timed mock.
For a static host: copy the contents of study-site to the chosen site directory, preserving every relative path. No build command, backend, rewrite rule or environment variable is required. Nothing has been published by this project.
Printing: open the desired lesson, reveal the answers you want included, then use Print lesson. Closed answers are omitted. Use the questions-only mock page for a clean attempt; full mock solutions are separate pages.
Original diagrams: activate the image to enlarge it, or use its full-size image link. Native Hint/Answer controls remain usable if JavaScript is disabled.

Read the verification status accurately

The coverage checklist distinguishes authored material from checked material. A conditional solution shows everything calculable from the source and names the missing condition. It does not invent a missing dimension, code clause or official answer. No supplementary source information is available: this has been confirmed. The $21$ affected source records therefore remain explicitly incomplete, with their available calculations and applicability conditions preserved.

See every source item and its current status. Read the source discrepancy log.

Checks performed and their limits

Check	Result	Limit
Original preservation	All $15$ original files and delivered copies have matching recorded SHA-256 hashes.	This proves byte preservation, not correctness of source answers.
Static links/assets	Audited local HTML targets, fragment anchors, images, SVG syntax and runtime network constructs.	See the delivered audit JSON for the latest exact counts; this does not execute a browser.
Image decoding	$317$ delivered PNG images decoded completely; the truncated crop found during review was replaced.	Readability was separately checked on source/crop images; CSS layout still needs browser review.
Numerical recalculation	$444$ checks; $0$ failures in the latest run.	Independent interpolation, column recalculation, weld-line integration and beam/bolt equilibrium. Does not establish missing source assumptions.
Substitution arithmetic	$799$ numeric-only equalities; $0$ outstanding flags.	Only expressions parsed by the deliberately narrow arithmetic audit are covered. Unparsed formulas are not automatically certified.
Original and derived diagrams	All $70$ original crops reviewed; all $10$ derived SVG figures rasterized and visually inspected.	Image inspection is not a browser/mobile layout test.
JavaScript	Syntax checked with node --check.	No browser interaction test has run.
Local HTTP transport	$87$ local paths served successfully with matching file bytes.	Loopback HTTP path/MIME check only; no browser execution and no external publishing.
Browser / mobile / print	Not run; local URL blocked by tool policy.	Required checks remain open. Do not interpret authored coverage as a finished verification claim.

Portable audit evidence

Local assets and source attribution

Source files remain credited by their original filenames and physical page/slide numbers. Student-facing explanations and invented practice are separated from official source material. No official marking scheme was supplied.

DejaVu Sans is bundled unmodified for local text and mathematical symbols. Its copyright and redistribution terms are included in the font license. Equations are pre-rendered HTML/Unicode; no online math renderer is required.