InThinking Subject Sites
Subscription websites for IB educators with integrated student access.
Disclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.
Forthcoming Workshops
Mathematics: Application & Interpretation
IBDP Category 1
Lisbon, Portugal
8 to 10 November 2019
more info
Mathematics: Analysis and Approaches
IBDP Category 1
Lisbon, Portugal
8 to 10 November 2019
more info
Mathematics: Implementing the MYP curriculum
IBMYP Category 1
Berlin, Germany
8 to 10 November 2019
more info
Find all InThinking Workshops at www.inthinking.net
Site Author
Quote 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
Textbooks for Mathematics HL and Mathematics SL
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
Recommendationsmore
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...
I highly recommend that HL teachers use your site. I am still amazed at all it has to offer. The wealth of material has made it so much easier for me to provide my students with problems that will help them learn any thing from the basics to accepting...
Blogsee all
Problem: find exact ratio of areas
1 September 2019
Here is a problem that I thought up (probably has appeared somewhere before but I have not seen it) which is presented in the GeoGebra applet... more
Probability  Complement Approach
1 June 2019
Question: Two fair sixsided dice are rolled. What is the probability that at least one of the dice shows a five facing up? more
Subscriber comments

Thank you very much for your feedback. I really appreciate it.

Hi Norazila, Thanks for your query  a good one. I must admit that Q.3 on the SLHL exponential modelling exercise set is not well constructed (I need to make some changes to it). The answers for 3(a) were computed by using the model population=175(1+0.8)^t,...

Hi, i would like to know if anyone already try this set of questions exercise set 26(4)25v2 SLHL (for Question #3). I tried quite a few times on questions #3(a)(iii) and #3(a)(iv) but I did not get the answer given in the solution key provided. I...

A very nice problem that would be great to use any time but especially during the study of trig.

Thank my student!! He is the one who caught it. I made the same mistake! Thanks for your site. You are truly helping me out.

Hi Jarod, You're absolutely correct. I should have specified that m cannot be zero; or at least said it had to be a quadratic equation which would have implied that. I've corrected the wording of the instructions for HL Problem 48. Thanks for...

In problem #48 do we have to exclude m=0 from the beginning? If m=0 then there will only be one real solution.

Hi Kenneth, Thanks for positive comment and pointing out the broken link. It should be working now. cheers, Tim

Hi Tim. The link for PoD#63 appears to be broken. Thanks for all the hard work you do.

Hi Henrry, Thanks for message. Please see note at top of this page that I wrote yesterday. Site coming soon. cheers, Tim

Hi is the new site for the new course ready now. I don't see much information on my page. It is said that it will should have been released by September. But still now I don't get to see much for the new course. please help

A valuable exercise as the students can quickly check their understanding.