How to Use This Site

1 The session loop

One study session is one section, worked in this order. The order matters more than the time you spend.

1. Read one section, then cover it and write the formulas and the main idea from memory.
2. Answer the recall check at the end of the section before you open its answers.
3. Solve the practice problems cold. Only then open the answer key.
4. In the lab, commit to a prediction before the simulation shows the result.
5. Tick a skill only when you can do it without notes.

Why this order: trying to remember before you look is what makes it stick. Reading again feels productive, but recall is what an exam asks for.

2 The hub

The hub is the home page. Use the semester buttons at the top to jump to a semester.

Review today

The board at the top lists the chapters you have started, most urgent first. now means a review is due today; in 5 d means it comes back in five days. Gaps grow with each review: 1 day, then 1 week, then 1 month. Show all chapters under the board opens the ones that are not due yet.

Subjects and the route

Each semester lists its subjects (APDR, MEI, EEI, MATLAB). Inside a subject, choose Lecture, Exercise or Tutorial to see that part's material; Exercise and Tutorial list their pages as rows, each saying what it covers. A subject with reference sheets that belong to no single chapter also has an Appendix tab, such as EEI’s Appendix A on coordinate systems; a part with nothing posted yet stays visible and says so. The home page remembers the tab you chose for each subject. Lecture chapters appear with their Study guide and Lab links, and the count under the subject name (“2 chapters”, “4 exercises”) folds or opens what the open tab shows. The green route line down the left is lit as far as the furthest chapter you have started, and a ring marks where you are.

The radar

The radar in the blue header shows every chapter you have started as a green square. Its direction is the subject and its distance from the centre is how far into that subject the chapter sits, so the squares move outward as you progress.

3 Reading a guide

A guide starts with Start from memory: questions to try before reading. Writing an answer, even a wrong one, shows you what to look for.

• Contents rail: the list on the left. The green line grows as you read and ends at the section you are in. Fold a group with its arrow, and use Chapters to jump to another chapter without going back to the hub. On a wide screen, the arrow at the top of the rail folds it away for a wider page, and the same arrow brings it back; the site remembers your choice. On a phone, the same list opens from the Contents bar at the top.
• Reading chip: once a section heading scrolls away, a small chip at the top of the page, for example §3.2 ▬▬▭ 4 min left 5 of 12, shows the section you are in, how far through it you are, roughly how many minutes of it are left, and where it sits in the guide.
• In plain words: a section opens with the idea in everyday language, in a box with a blue rule. Read it first; the symbols after it name what it describes.
• Formula cards have corner brackets. The first line of a card's note, in italics, says how to read the formula aloud. Write the formula from memory before you read it.
• Diagrams sit right after the formula card they illustrate: Venn diagrams, number lines, bit cells, the unit circle and field lines. Blue marks the part the caption is about.
• Arrow diagrams show how a mapping pairs inputs with outputs. Blue marks the part that matters, such as an output reached twice; grey marks an output nothing reaches.
• Near miss: an example that almost fits a definition and fails. Work out why before you read the reason.
• Worked examples: press Step through to reveal one step at a time, and try each step before you reveal it.
• Recall checks close each section. Open Check these answers only after writing yours down.
• Symbols: with a mouse, hover a symbol such as E to underline everywhere it appears in that section.
• Concept map: select a topic to see what it builds on. The lines run from what you need first to the selected topic.

4 Working a lab

Each experiment asks a question about the chapter. Answer it in three steps:

1. Predict: choose an answer.
2. Rate your confidence: Sure, Think so, or Guessing.
3. Reveal: the lab shows the result and explains it.

Your results at the end of the lab lists what you got right and, separately, anything you were sure of but got wrong. Those are the misconceptions to fix first.

Explore freely under any challenge opens the experiment’s sandbox straight away: change the controls, drag on the stage where it lets you, then press Back to challenge to carry on where you were. Finishing all the challenges still ticks the skill.

Some sandboxes also have Or try your own: type your own bits, numbers, rule or formula, and the stage follows as you type. If it cannot read what you typed, a line under the box says what to change. Under a bit pattern, a row of cells lets you flip one bit per press. The EEI charge lab can save your charge layout in this browser and restore it later.

Where an experiment shows New challenge after its fixed challenges, it makes a fresh question with new numbers each time. These practice questions are not saved, so they never change your results.

5 Ticks and reviews

The end of each guide has a checklist of skills. Tick one only when you can do it from a blank page. The bar under the chapter title fills as you tick, and a full bar gets a green line.

When you come back to a chapter for a review, press Log today's review. That schedules the next one and moves the chapter on the hub's board.

6 Settings and offline

The gear button beside All semesters (or beside the semester buttons on the hub) opens Settings:

• Theme: System, Light or Dark. System follows your device.
• Motion: System or Reduced. Reduced stops every animation on the site.
• Text size: Default or Large.

Each guide can be downloaded as a clean PDF for printing, or as its LaTeX source.

Your progress lives in this browser. Ticks, reviews, lab results and settings are saved on this device only. A different browser or device starts fresh, and clearing this site's data resets it.