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Forthcoming Workshops
Mathematics SL
IBDP Category 2
Berlin, Germany
24 to 26 February 2017
more info
Mathematics HL
IBDP Category 2
Berlin, Germany
24 to 26 February 2017
more info
Mathematical studies SL
IBDP Category 2
Berlin, Germany
24 to 26 February 2017
more info
Find all InThinking Workshops at www.inthinking.net
Site Author
Tim Garry is the site author and has taught mathematics from middle school to university since 1984 and been Head of Maths at three international schools. He's also been an IB examiner for external & internal assessment, contributor to IB curriculum reviews & Maths HL exam writing teams, delivered numerous workshops & coauthored IB maths textbooks (see below).
moreQuote of the day
Many who have had an opportunity of knowing any more about mathematics confuse it with arithmetic, and consider it an arid science. In reality, however, it is a science which requires a great amount of imagination.
(Sofia Kovalevskaya, 18501891)
Resources
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 ebook (accessed through a website) containing a complete digital copy of the text along with numerous additional material.
School visits
If you are interested in Tim Garry visiting your school to work with teachers and/or students, please contact us.
Home2Home
The vacation home exchange service for the IB community.
Feel at home when you travel the world.
www.home2homeinthinking.co.uk
Problem of the Day
Below you will find two growing sets of 'problems' (one for SL and another for HL) with one new 'problem' added nearly every day to each set. The idea behind the Problem of the Day is to offer students examlike questions that should involve some level of problem solving and the application of knowledge/skills in IB Maths SL and IB Maths HL. Certainly most of the SL 'problems'...
Recommendationsmore
I really like the continuously expanding InThinking Maths HL & SL resources. I always find something useful among the plentiful, practical, wellformatted resources  including notes, assignments, assessments, and interesting student pages. Absolutely...
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...
The InThinking Maths website is a very beneficial and userfriendly 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...
Blogmore
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

Please explain question #4 in the Descriptive Statistics 1 section

Please explain question #4 in the Descriptive Statistics ! section

Taha, Thanks for feedback. "Integral" can be an adjective which means "denoted by an integer", but I think you're right  better to have the word "integer" because of the other meaning of "integral" in calculus; possibly confusing for students....

Hi Tim. Thanks for these new Mock Papers. These make my life a ton easier. I just wanted to point out a typo in MockB HL P1 2017. Question 4 asks to find 'a quadratic equation with integral coefficients'. I think you meant 'integer coefficients'....

Agnes, Thanks for the positive feedback. Your solution for SL Problem 4 is certainly much simpler than mine. When writing the question, I was trying to come up with something that could apply conditional probability  so I was focused on using...

Hi thank you for these problems  a great set of resources! An alternative, simpler solution for the 4th problem is to consider that if the oldest child is a boy then the first three will need to be boys for all of them to be boys, and the...

Babette, Thank you. There were a couple of other errors in Mock B SL Paper 2. I've made corrections and have uploaded a version 3 for both the exam and markscheme above.

There is another mistake in the table in question 3  it must be x in months not x in years.

Thank you very much for the sample Mock examination. I had the same problems as you mentioned in the email  students have uploaded past papers and prepared the Mock in this way. So now I am able to use the one from 2017 from you and Iam very...

This site helped me a lot for my first years in ib hl,but as time passes by i need to make an advice that past papers should be given in this site alo.

Babette, thank you for bringing this error to my attention. For Q.9 part (c) on the Math SL Paper 2 mock (2017), it seems clear that I computed the interval within just one standard deviation, rather than oneandahalf standard deviations...

Hallo I think there is a mistake in the markingscheme of SL question 9 in 2017 Mock examination. The standard derviation is 7.8cm (calculated in a) Now students are aseked to calculate the range of accepted applicants which must be within 1.5...