Cambridge IGCSE to A Level · made to order

The chapter your child is stuck on, rebuilt to make sense.

Tell us any Cambridge chapter they can't get through, any subject from IGCSE to A Level. We turn it into a colour-coded LUMA guide they can follow on their own: clear, calm, step by step.

● Maths● Sciences● Business● Humanities● and more
See the packages

Pay upfront from $5. We build by hand, and refund in full if we can't do your exact request.

Why this exists

They're not behind because they're not clever.

A class moves at one speed, and a teacher has one set of hands. When a lesson moves on before it lands, a bright student can still end up lost. The subject is not beyond them. The delivery just never waited.

"I've watched them stare at the same page for an hour and give up."

A LUMA guide is the part of teaching that can wait. It doesn't move on until the page is understood.

Same syllabus. A page they can actually finish.

Scroll and watch the textbook page become a LUMA guide. Same content, colour-coded so your child always knows what they're reading.

A normal textbook page
● The same content in LUMA
Core idea: what this topic is
Definition: the key term, in plain words
Worked example: step by step
Analysis: why it matters
Exam trap: the mistake to avoid

Exactly how it works, start to finish.

No surprises. You pay upfront, a Cambridge educator builds it by hand, and if we can't do your exact request we refund you in full.

1

You tell us the chapter

Through the chat or by email: the subject, the level and the chapter, topic or unit. It takes about a minute.

2

You pay to start

A secure one-time payment through Gumroad, from $5. Paying is what begins the build. Your card is handled by Gumroad, never by us.

Secure · refundable
3

We build it by hand

A Cambridge educator rebuilds it in the LUMA method. Maths and worked solutions are double-checked line by line.

4

You get the PDF

Delivered to your inbox, usually within a day or two. Read it on any device, or print it.

5

Clearer, or your money back

If it doesn't make the topic clearer, we rebuild it free. And if we can't do your exact request, we refund you in full.

🔒How payment works

Payment runs through Gumroad, a trusted global checkout. You pay upfront so we can start straight away, and the moment you pay you get a Start Here guide and a receipt. Your card details go to Gumroad, never to us. If we can't build your exact request, it's a one-click refund.

Pick how much you need rebuilt.

Every guide is made to order and mapped to your exact syllabus. Start small, or do a whole unit.

Single chapter
$5
One chapter, rebuilt. The simplest way to see if LUMA works for your child.
  • One full Cambridge chapter, any subject
  • Colour-coded: core, definition, example, analysis, exam trap
  • Retrieval questions to check it stuck
Get a chapter for $5 Questions? Chat with us
Exam-Season Pack
$49
A whole unit rebuilt, plus everything for the run-up to exams.
✦ Clearer, or we rebuild it free
  • A full unit in the LUMA method
  • Retrieval-question banks
  • An exam-trap sheet for the unit
  • A one-page syllabus map
  • A progress checklist
Get the pack for $49 Priority build, delivered first
Topic Pack
$19
A full topic, three to five linked chapters, built as one coherent set.
  • 3 to 5 linked chapters, one topic
  • The full colour-coded method throughout
  • Retrieval questions across the topic
Get the pack for $19 Best value per chapter
In every LUMA guide
Plain language, full exam depthMapped to your syllabusA clean PDF to read or printBuilt by Cambridge educators

Prefer email?

Send us the subject, level and chapter and we'll take it from there.

Questions parents ask

Which subjects and levels can I order?
Any Cambridge subject, from IGCSE and O Level to AS and A Level: Maths, the Sciences, Business, Economics, Humanities and more. Every guide is made to order and mapped to your exact syllabus. If anything is a poor fit, we will tell you honestly before you pay.
How does payment work, and when do I pay?
You only pay once we have confirmed we can build your guide well. We then send a secure Gumroad link. Your card details go to Gumroad, not to us. It is a one-time payment, no subscription, and you get an instant receipt.
What is the difference between the packages?
A single chapter is one chapter rebuilt, the best way to try LUMA. A Topic Pack is a full topic of three to five linked chapters. The Exam-Season Pack is a whole unit plus retrieval-question banks, an exam-trap sheet, a syllabus map and a progress checklist for the run-up to exams.
What is your guarantee?
If a guide does not make the topic clearer for your child, tell us and we rebuild it free. We never guarantee a grade, and anyone who does is not being honest with you. We promise a clearer way to learn.
My child finds textbooks overwhelming. Will this help?
That's exactly who this is for. The colour coding and small steps are designed to reduce overwhelm, so your child always knows what kind of thing they're reading and what to do next.
How is it delivered and how long does it take?
As a PDF you can read on any device or print. Most single chapters are ready within a few days, often within a day. We'll confirm a date when you send the request.