Download our brochure


Standard Level Mathematics

Textbooks for Math HL and Math SL. Two textbooks written by Tim Garry and Ibrahim Wazir that are fully revised 2nd editions providing comprehensive coverage for the new 2014 syllabuses. Each textbook comes with an e-book (accessed through a website) containing a complete digital copy of the text along with numerous additional material.


Download our brochure


I really like the continuously expanding InThinking Maths HL & SL resources. I always find something useful among the plentiful, practical, well-formatted resources - including notes, assignments, assessments, and interesting student pages. Absolutely...

Holly Garner, Lincoln Community School, Ghana

I love the "accessible" to "discriminating" levelled questions. They are great for differentiation in the classroom - especially as time in the IB classroom is so precious. Students start work at their own comfort level, discuss in...

Catherine Cooke, St John's International School, Belgium

The InThinking Maths website is a very beneficial and user-friendly online guide for IB teachers. You can get an answer to all of your questions. There are all sort of materials and support, many samples of course designs, explorations, exams, teaching...

Şhenaz Tekin, FMV Erenköy Işik High School, Turkey


Challenge Problems (#10)

Sunday 10 April 2016

To me - and to most people who enjoy mathematics - solving a problem that requires insight, perseverance and creative use of mathematical knowledge... more

Measuring the earth's radius 1000 years ago

Tuesday 10 November 2015

This past weekend I was reading a review of a new history book, The Silk Roads by Oxford historian Peter Frankopan, in which the reviewer states... more

Perplexing Pentagons (Exploration Idea #499)

Sunday 13 September 2015

Recently, a Maths SL student asked for my thoughts about her writing an Exploration (IA) on tilings of the plane (Euclidean tessellations).... more

Subscriber comments

  • 28 Mar math sec
    Sample Mock Exams
    Sorry - hit "submit" before it was finished. This affects the probability that X is between 160 and 180 -- that should be 0.80. But then how can Prob (160 X 185) be 0.75?
  • 28 Mar math sec
    Sample Mock Exams
    Hi Tim - I think there might be an error in question 9, 2017, SL paper 2. If P(X
  • 26 Mar Tim Garry
    Calculus HL option
    Cara, Oops - sorry about that. I've now uploade a new 'version 3' of the Solution Key for the P3 mock exam with answer (not really a worked solution) for Q.2(b).
  • 25 Mar Cara Glintermeyer
    Calculus HL option
    Thank you for the Mock Exam, I see the solution to 2b is missing.
  • 25 Mar math sec
    Problem of the Day
    My grade 11 students also have "enjoyed" them -- I choose the questions that address topics we've already covered -- never too early to revise! Thanks, Tim!
  • 24 Mar Dorota Lipka
    Problem of the Day
    Thank you for these problems! Myself and my SL class are loving them as part of our revision
  • 23 Mar Holly Garner
    further differentiation methods
    Thank you, using the 9 problem sheet as review for upcoming test. All of this stuff really helps me a lot! :)
  • 23 Mar Holly Garner
    differentiation basics - Notes
    thank you!
  • 21 Mar Tim Garry
    Problem of the Day
    Jill, Gosh ! what was I thinking. Apologies for my confused response and solution to SL POTD #26. When I looked at it again, I realize that my solution confused combinations with permutations. I've now fixed my solution - still different...
  • 21 Mar math sec
    Problem of the Day
    Hi Tim - Thanks but 20(1/216) and 5/9 aren't the same. So that's why we were confused. Jill
  • 21 Mar Henry Liou
    Sample Mock Exams
    Hi Tim :) Thank you soooooo much for putting together these mock exam papers. And as you mentioned, I hope everyone who uses your mock exam papers would NOT share these online or with their students. Keep up the good work!
  • 20 Mar Tim Garry
    Problem of the Day
    Jill, What your student has suggested is an alternative method of getting the same answer. Admittedly, probably a simpler method than the one I wrote - but both give the same correct answer, i.e. 5/9. Kudos to your student