InThinking Subject Sites
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New School Leadership website
InThinking is pleased to announce the launch of our School Leadership website.
www.thinkib.net/leadershipForthcoming Workshops
Mathematics SL
IBDP Category 1
Barcelona, Spain
6 to 8 October 2017
more info
Mathematics HL
IBDP Category 2
Barcelona, Spain
6 to 8 October 2017
more info
Mathematical studies SL
IBDP Category 1
Barcelona, Spain
6 to 8 October 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
There are currently 150 problems (75 SL + 75 HL) with more problems added every week. There are separate pages for the SL Problem of the Day and for the HL Problem of the Day HL Problem of the Day #74 There are two growing sets of 'problems' (one for SL and another for HL) with one new 'problem' added nearly every day to each set (along with a worked solution)....
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...
Tim's InThinking site has been invaluable to me as a new IB teacher. Before starting any new syllabus item, I use the site to gain a better understanding of the types of problems that my students need to be able to solve. It has helped me to format...
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...
Blogmore
Challenge Problems (#10)
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
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)
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

Solomon, Thanks very much for catching the error. I've removed the extra expressions of y=f(IxI). Again, thanks for the feedback.

y=f(x) and y=f(x)

Typological error in topic 2.2 Modulus functions (HL in red). Please fix I love this site!

Marie, Thanks very much for pointing out the error in the solution for SL Problem #42 part (c)  very helpful feedback. I've corrected the solution and have posted a corrected version 2 for #42 above.

Thanks Tim.

Hi, Just wanted to let you know that there is an error in question # 22 c) the solution interval is between the 2 roots. Thank you for all these great problems. Marie

John, Thanks for pointing this out. Not sure what happened to the link for the MockA HL Paper 1 markscheme 2014, but I've fixed it  so should work for you now. Thanks.

Hi Tim. Thanks for these  very helpful. Trying to use the 2014 mock resources...not sure why, but the link to HL 2014 Paper 1 MS isn't working?

Daniel, Thanks for the very useful feedback. I seem to have mixed up two different questions. I've made corrections to Q.1 both on this page and the downloadable PDF. Thanks.

The graph shown on #1 from the download doesn't correspond to the function.

Thanks for posting some about the Stat option. Actually one of the reasons for subscribing to this website was for the HL Stat option as I am teaching it for the first time. Any recommendations on resources out there? I was hoping to get some...

Great Job Gary! I love the updated "problem of the day"