Before you pay anything
- Free to tryThe first lesson of every unit, 423 lessons in all, opens with no account and no card.
- Full refund within 30 daysReply to your receipt or email hello@ksmaths.com. No questions.
- Nothing renews by surpriseYearly plans are one payment and never renew. The monthly plan cancels anytime, in two clicks.
- Free pilot for schoolsA head of maths can open the whole teacher side free: 14 days for a department, 7 days for one teacher. No payment details.
- Invoice or purchase orderSchools can pay by invoice. Send the school name and any PO number and the invoice comes within one working day.
- Safe card paymentGumroad takes the payment, charges any tax due in your country and sends the receipt. Prices are in US$; you see your own currency at checkout.
For students and families
A plan opens every lesson in its range: every figure to move, every question checked as it is typed, and a note on what each wrong answer means. One plan covers every child in the family.
$12 a month, cancel anytime
- Every Diploma lesson: AA and AI, SL and HL
- Every lesson from Year 7, for the refreshers
- Cancel from your Gumroad library; access runs to the end of the month you paid for
- First month refunded in full if you ask within 30 days
$99 one payment, nothing renews
Saves $45 against paying monthly- Everything in the monthly plan
- Every revision pack as a printable PDF
- Choose your course and level; every option opens AA and AI, SL and HL
- 2 years for $149, enough to reach the Year 13 exams
$59 for 12 months, or $99 for 2 years
- Every lesson from Year 7 to Year 11, Standard and Extended
- Every Year 7 to 11 revision pack as a printable PDF
- Brothers and sisters in different years are covered
Just revising one year? A revision pack is $19: a printable PDF of 100 exam-style questions with a mock paper, plus that year's lessons online for 90 days. Already have a pack or the Years 7 to 11 plan? Move up and the unused part comes off. After paying, open any lesson and type the email you paid with: we email you a sign-in link.
For teachers and schools
Every lesson has a teacher page beside it: full worked answers, what each common wrong answer tells you, a timed plan for the hour, and questions at three levels. Every MYP unit has assessment tasks across criteria A to D (Knowing and understanding, Investigating patterns, Communicating, Applying mathematics in real-life contexts), with markschemes.
$49 one payment for 24 months
- Every teacher page, all 423 lessons
- Every MYP assessment with its markscheme
- For one named teacher or private tutor
- Twice the usual 12 months, for the first 25 teachers
$349 one payment for 12 months, nothing renews
- Everything in the teacher licence, for every maths teacher at one school
- Every lesson for every pupil at the school
- Pay by card, or by invoice or purchase order
$69 for 5 students, 12 months
- One code per student, opening every lesson from Year 7 to the Diploma
- 10 students $109, 30 students $199
- Your own teacher pages included; codes appear the moment you pay
What students get with the school licence. Every one of the 423 lessons, MYP Year 7 to the IB Diploma, on any phone, tablet or computer. There are no student accounts: pupils open the lessons by typing the school code at Sign in.
Students never see teacher pages, markschemes or assessment tasks, so every task stays unseen until a teacher sets it.
Can we pay by invoice or purchase order?
Yes. Email hello@ksmaths.com with the school name, the billing contact and any purchase order number. You get an invoice within one working day, with a card payment link through Gumroad.
Can we try it before we pay?
Yes. Teach the free first lesson of any unit this week, or ask for a pilot code: the whole teacher side opens for 14 days for a department, or 7 days for one teacher. No payment details, and nothing renews. Whole sample units, with teacher pages and markschemes, are open on the schools page.
What if it is not right for us?
Email within 30 days of paying for a full refund. No questions.
Is this official IB material?
No. It is independent lesson and assessment material written by a head of mathematics with thirty years in the classroom. Nothing reproduces IB syllabus or criterion text.
Who is selling this?
Keith Spencer, trading as KS Maths, Bangkok, Thailand. Gumroad is the merchant of record for card payments and issues the receipt and any VAT invoice. Questions: hello@ksmaths.com.